Changes for skylighting-0.5.

This fixes a bug in 2.0.4, whereby pandoc could not
read the theme files generated with `--print-highlight-style`.

It also fixes some CSS issues involving line numbers.
Highlighted code blocks are now enclosed in a div with class
sourceCode.

Highlighting CSS no longer sets a generic color for pre
and code; we only set these for class `sourceCode`.

This will close #4133 and #4128.

pandoc.cabal

@@ -322,7 +322,7 @@ library
                  tagsoup >= 0.14.2 && < 0.15,
                  base64-bytestring >= 0.1 && < 1.1,
                  zlib >= 0.5 && < 0.7,
-                 skylighting >= 0.4.4.1 && < 0.5,
+                 skylighting >= 0.5 && < 0.6,
                  data-default >= 0.4 && < 0.8,
                  temporary >= 1.1 && < 1.3,
                  blaze-html >= 0.5 && < 0.10,

src/Text/Pandoc/App.hs

@@ -1074,7 +1074,8 @@ options =
                                   (map T.pack
                                    ["text-color"
                                    ,"background-color"
-                                   ,"line-numbers"
+                                   ,"line-number-color"
+                                   ,"line-number-background-color"
                                    ,"bold"
                                    ,"italic"
                                    ,"underline"

src/Text/Pandoc/Writers/Docx.hs

@@ -625,12 +625,12 @@ styleToOpenXml sm style =
                                [ mknode "w:u" [] () | tokFeature tokenUnderline toktype ]
                              ]
         tokStyles = tokenStyles style
-        tokFeature f toktype = maybe False f $ lookup toktype tokStyles
+        tokFeature f toktype = maybe False f $ M.lookup toktype tokStyles
         tokCol toktype = maybe "auto" (drop 1 . fromColor)
-                         $ (tokenColor =<< lookup toktype tokStyles)
+                         $ (tokenColor =<< M.lookup toktype tokStyles)
                            `mplus` defaultColor style
         tokBg toktype = maybe "auto" (drop 1 . fromColor)
-                         $ (tokenBackground =<< lookup toktype tokStyles)
+                         $ (tokenBackground =<< M.lookup toktype tokStyles)
                            `mplus` backgroundColor style
         parStyle | hasStyleName "Source Code" (sParaStyleMap sm) = Nothing
                  | otherwise = Just $

src/Text/Pandoc/Writers/Ms.hs

@@ -586,7 +586,7 @@ styleToMs sty = vcat $ colordefs ++ map (toMacro sty) alltoktypes
         allcolors = catMaybes $ ordNub $
           [defaultColor sty, backgroundColor sty,
            lineNumberColor sty, lineNumberBackgroundColor sty] ++
-           concatMap (colorsForToken. snd) (tokenStyles sty)
+           concatMap (colorsForToken. snd) (Map.toList (tokenStyles sty))
         colorsForToken ts = [tokenColor ts, tokenBackground ts]
 
 hexColor :: Color -> String
@@ -611,7 +611,7 @@ toMacro sty toktype =
         resetfont = if tokBold || tokItalic
                        then text "\\\\f[C]"
                        else empty
-        tokSty = lookup toktype (tokenStyles sty)
+        tokSty = Map.lookup toktype (tokenStyles sty)
         tokCol = (tokSty >>= tokenColor) `mplus` defaultColor sty
         -- tokBg  = (tokSty >>= tokenBackground) `mplus` backgroundColor sty
         tokBold = fromMaybe False (tokenBold <$> tokSty)

stack.pkg.yaml

@@ -16,7 +16,7 @@ extra-deps:
 - pandoc-types-1.17.3
 - hslua-0.9.3
 - hslua-module-text-0.1.2
-- skylighting-0.4.4.1
+- skylighting-0.5
 - texmath-0.10
 - cmark-gfm-0.1.1
 - QuickCheck-2.10.0.1

stack.yaml

@@ -5,12 +5,11 @@ flags:
     old-locale: false
     network-uri: true
 packages:
-- '.'
 extra-deps:
 - pandoc-types-1.17.3
 - hslua-0.9.3
 - hslua-module-text-0.1.2
-- skylighting-0.4.4.1
+- skylighting-0.5
 - texmath-0.10
 - cmark-gfm-0.1.1
 - QuickCheck-2.10.0.1

test/lhs-test.html

@@ -13,16 +13,24 @@
       div.column{display: inline-block; vertical-align: top; width: 50%;}
   </style>
   <style type="text/css">
-a.sourceLine { display: inline-block; min-height: 1.25em; }
+a.sourceLine { display: inline-block; line-height: 1.25; }
 a.sourceLine { pointer-events: none; color: inherit; text-decoration: inherit; }
+a.sourceLine:empty { height: 1.2em; position: absolute; }
 .sourceCode { overflow: visible; }
-code.sourceCode { white-space: pre; }
+code.sourceCode { white-space: pre; position: relative; }
+div.sourceCode { margin: 1em 0; }
+pre.sourceCode { margin: 0; }
+@media screen {
+div.sourceCode { overflow: auto; }
+}
 @media print {
 code.sourceCode { white-space: pre-wrap; }
 a.sourceLine { text-indent: -1em; padding-left: 1em; }
 }
 pre.numberSource a.sourceLine
   { position: relative; }
+pre.numberSource a.sourceLine:empty
+  { position: absolute; }
 pre.numberSource a.sourceLine::before
   { content: attr(data-line-number);
     position: absolute; left: -5em; text-align: right; vertical-align: baseline;
@@ -34,38 +42,40 @@ pre.numberSource a.sourceLine::before
     color: #aaaaaa;
   }
 pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+div.sourceCode
+  {  }
 @media screen {
-a.sourceLine::before { text-decoration: underline; color: initial; }
+a.sourceLine::before { text-decoration: underline; }
 }
-code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.al { color: #ff0000; font-weight: bold; } /* Alert */
+code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
+code span.at { color: #7d9029; } /* Attribute */
+code span.bn { color: #40a070; } /* BaseN */
+code span.bu { } /* BuiltIn */
+code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
+code span.ch { color: #4070a0; } /* Char */
+code span.cn { color: #880000; } /* Constant */
+code span.co { color: #60a0b0; font-style: italic; } /* Comment */
+code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
+code span.do { color: #ba2121; font-style: italic; } /* Documentation */
 code span.dt { color: #902000; } /* DataType */
 code span.dv { color: #40a070; } /* DecVal */
-code span.bn { color: #40a070; } /* BaseN */
-code span.fl { color: #40a070; } /* Float */
-code span.ch { color: #4070a0; } /* Char */
-code span.st { color: #4070a0; } /* String */
-code span.co { color: #60a0b0; font-style: italic; } /* Comment */
-code span.ot { color: #007020; } /* Other */
-code span.al { color: #ff0000; font-weight: bold; } /* Alert */
-code span.fu { color: #06287e; } /* Function */
 code span.er { color: #ff0000; font-weight: bold; } /* Error */
-code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
-code span.cn { color: #880000; } /* Constant */
-code span.sc { color: #4070a0; } /* SpecialChar */
-code span.vs { color: #4070a0; } /* VerbatimString */
-code span.ss { color: #bb6688; } /* SpecialString */
-code span.im { } /* Import */
-code span.va { color: #19177c; } /* Variable */
-code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
-code span.op { color: #666666; } /* Operator */
-code span.bu { } /* BuiltIn */
 code span.ex { } /* Extension */
-code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.fl { color: #40a070; } /* Float */
-code span.at { color: #7d9029; } /* Attribute */
+code span.fu { color: #06287e; } /* Function */
-code span.do { color: #ba2121; font-style: italic; } /* Documentation */
+code span.im { } /* Import */
-code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
-code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
 code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Information */
+code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.op { color: #666666; } /* Operator */
+code span.ot { color: #007020; } /* Other */
+code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.sc { color: #4070a0; } /* SpecialChar */
+code span.ss { color: #bb6688; } /* SpecialString */
+code span.st { color: #4070a0; } /* String */
+code span.va { color: #19177c; } /* Variable */
+code span.vs { color: #4070a0; } /* VerbatimString */
+code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
   </style>
   <!--[if lt IE 9]>
     <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
@@ -75,9 +85,9 @@ code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Infor
 <h1 id="lhs-test">lhs test</h1>
 <p><code>unsplit</code> is an arrow that takes a pair of values and combines them to
 return a single value:</p>
-<pre class="sourceCode literate haskell" id="cb1"><code class="sourceCode haskell"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="ot">unsplit ::</span> (<span class="dt">Arrow</span> a) <span class="ot">=&gt;</span> (b <span class="ot">-&gt;</span> c <span class="ot">-&gt;</span> d) <span class="ot">-&gt;</span> a (b, c) d</a>
+<div class="sourceCode" id="cb1"><pre class="sourceCode literate haskell"><code class="sourceCode haskell"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="ot">unsplit ::</span> (<span class="dt">Arrow</span> a) <span class="ot">=&gt;</span> (b <span class="ot">-&gt;</span> c <span class="ot">-&gt;</span> d) <span class="ot">-&gt;</span> a (b, c) d</a>
 <a class="sourceLine" id="cb1-2" data-line-number="2">unsplit <span class="fu">=</span> arr <span class="fu">.</span> uncurry</a>
-<a class="sourceLine" id="cb1-3" data-line-number="3">          <span class="co">-- arr (\op (x,y) -&gt; x `op` y)</span></a></code></pre>
+<a class="sourceLine" id="cb1-3" data-line-number="3">          <span class="co">-- arr (\op (x,y) -&gt; x `op` y)</span></a></code></pre></div>
 <p><code>(***)</code> combines two arrows into a new arrow by running the two arrows on a
 pair of values (one arrow on the first item of the pair and one arrow on the
 second item of the pair).</p>

test/lhs-test.html+lhs

@@ -13,16 +13,24 @@
       div.column{display: inline-block; vertical-align: top; width: 50%;}
   </style>
   <style type="text/css">
-a.sourceLine { display: inline-block; min-height: 1.25em; }
+a.sourceLine { display: inline-block; line-height: 1.25; }
 a.sourceLine { pointer-events: none; color: inherit; text-decoration: inherit; }
+a.sourceLine:empty { height: 1.2em; position: absolute; }
 .sourceCode { overflow: visible; }
-code.sourceCode { white-space: pre; }
+code.sourceCode { white-space: pre; position: relative; }
+div.sourceCode { margin: 1em 0; }
+pre.sourceCode { margin: 0; }
+@media screen {
+div.sourceCode { overflow: auto; }
+}
 @media print {
 code.sourceCode { white-space: pre-wrap; }
 a.sourceLine { text-indent: -1em; padding-left: 1em; }
 }
 pre.numberSource a.sourceLine
   { position: relative; }
+pre.numberSource a.sourceLine:empty
+  { position: absolute; }
 pre.numberSource a.sourceLine::before
   { content: attr(data-line-number);
     position: absolute; left: -5em; text-align: right; vertical-align: baseline;
@@ -34,38 +42,40 @@ pre.numberSource a.sourceLine::before
     color: #aaaaaa;
   }
 pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+div.sourceCode
+  {  }
 @media screen {
-a.sourceLine::before { text-decoration: underline; color: initial; }
+a.sourceLine::before { text-decoration: underline; }
 }
-code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.al { color: #ff0000; font-weight: bold; } /* Alert */
+code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
+code span.at { color: #7d9029; } /* Attribute */
+code span.bn { color: #40a070; } /* BaseN */
+code span.bu { } /* BuiltIn */
+code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
+code span.ch { color: #4070a0; } /* Char */
+code span.cn { color: #880000; } /* Constant */
+code span.co { color: #60a0b0; font-style: italic; } /* Comment */
+code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
+code span.do { color: #ba2121; font-style: italic; } /* Documentation */
 code span.dt { color: #902000; } /* DataType */
 code span.dv { color: #40a070; } /* DecVal */
-code span.bn { color: #40a070; } /* BaseN */
-code span.fl { color: #40a070; } /* Float */
-code span.ch { color: #4070a0; } /* Char */
-code span.st { color: #4070a0; } /* String */
-code span.co { color: #60a0b0; font-style: italic; } /* Comment */
-code span.ot { color: #007020; } /* Other */
-code span.al { color: #ff0000; font-weight: bold; } /* Alert */
-code span.fu { color: #06287e; } /* Function */
 code span.er { color: #ff0000; font-weight: bold; } /* Error */
-code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
-code span.cn { color: #880000; } /* Constant */
-code span.sc { color: #4070a0; } /* SpecialChar */
-code span.vs { color: #4070a0; } /* VerbatimString */
-code span.ss { color: #bb6688; } /* SpecialString */
-code span.im { } /* Import */
-code span.va { color: #19177c; } /* Variable */
-code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
-code span.op { color: #666666; } /* Operator */
-code span.bu { } /* BuiltIn */
 code span.ex { } /* Extension */
-code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.fl { color: #40a070; } /* Float */
-code span.at { color: #7d9029; } /* Attribute */
+code span.fu { color: #06287e; } /* Function */
-code span.do { color: #ba2121; font-style: italic; } /* Documentation */
+code span.im { } /* Import */
-code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
-code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
 code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Information */
+code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.op { color: #666666; } /* Operator */
+code span.ot { color: #007020; } /* Other */
+code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.sc { color: #4070a0; } /* SpecialChar */
+code span.ss { color: #bb6688; } /* SpecialString */
+code span.st { color: #4070a0; } /* String */
+code span.va { color: #19177c; } /* Variable */
+code span.vs { color: #4070a0; } /* VerbatimString */
+code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
   </style>
   <!--[if lt IE 9]>
     <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
@@ -75,9 +85,9 @@ code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Infor
 <h1 id="lhs-test">lhs test</h1>
 <p><code>unsplit</code> is an arrow that takes a pair of values and combines them to
 return a single value:</p>
-<pre class="sourceCode literate literatehaskell" id="cb1"><code class="sourceCode literatehaskell"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="ot">&gt; unsplit ::</span> (<span class="dt">Arrow</span> a) <span class="ot">=&gt;</span> (b <span class="ot">-&gt;</span> c <span class="ot">-&gt;</span> d) <span class="ot">-&gt;</span> a (b, c) d</a>
+<div class="sourceCode" id="cb1"><pre class="sourceCode literate literatehaskell"><code class="sourceCode literatehaskell"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="ot">&gt; unsplit ::</span> (<span class="dt">Arrow</span> a) <span class="ot">=&gt;</span> (b <span class="ot">-&gt;</span> c <span class="ot">-&gt;</span> d) <span class="ot">-&gt;</span> a (b, c) d</a>
 <a class="sourceLine" id="cb1-2" data-line-number="2"><span class="ot">&gt;</span> unsplit <span class="fu">=</span> arr <span class="fu">.</span> uncurry</a>
-<a class="sourceLine" id="cb1-3" data-line-number="3"><span class="ot">&gt;</span>           <span class="co">-- arr (\op (x,y) -&gt; x `op` y)</span></a></code></pre>
+<a class="sourceLine" id="cb1-3" data-line-number="3"><span class="ot">&gt;</span>           <span class="co">-- arr (\op (x,y) -&gt; x `op` y)</span></a></code></pre></div>
 <p><code>(***)</code> combines two arrows into a new arrow by running the two arrows on a
 pair of values (one arrow on the first item of the pair and one arrow on the
 second item of the pair).</p>

test/lhs-test.latex

@@ -39,37 +39,37 @@
 \DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\{\}}
 % Add ',fontsize=\small' for more characters per line
 \newenvironment{Shaded}{}{}
-\newcommand{\KeywordTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{\textbf{#1}}}
+\newcommand{\AlertTok}[1]{\textcolor[rgb]{1.00,0.00,0.00}{\textbf{#1}}}
+\newcommand{\AnnotationTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
+\newcommand{\AttributeTok}[1]{\textcolor[rgb]{0.49,0.56,0.16}{#1}}
+\newcommand{\BaseNTok}[1]{\textcolor[rgb]{0.25,0.63,0.44}{#1}}
+\newcommand{\BuiltInTok}[1]{#1}
+\newcommand{\CharTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
+\newcommand{\CommentTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textit{#1}}}
+\newcommand{\CommentVarTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
+\newcommand{\ConstantTok}[1]{\textcolor[rgb]{0.53,0.00,0.00}{#1}}
+\newcommand{\ControlFlowTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{\textbf{#1}}}
 \newcommand{\DataTypeTok}[1]{\textcolor[rgb]{0.56,0.13,0.00}{#1}}
 \newcommand{\DecValTok}[1]{\textcolor[rgb]{0.25,0.63,0.44}{#1}}
-\newcommand{\BaseNTok}[1]{\textcolor[rgb]{0.25,0.63,0.44}{#1}}
-\newcommand{\FloatTok}[1]{\textcolor[rgb]{0.25,0.63,0.44}{#1}}
-\newcommand{\ConstantTok}[1]{\textcolor[rgb]{0.53,0.00,0.00}{#1}}
-\newcommand{\CharTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
-\newcommand{\SpecialCharTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
-\newcommand{\StringTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
-\newcommand{\VerbatimStringTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
-\newcommand{\SpecialStringTok}[1]{\textcolor[rgb]{0.73,0.40,0.53}{#1}}
-\newcommand{\ImportTok}[1]{#1}
-\newcommand{\CommentTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textit{#1}}}
 \newcommand{\DocumentationTok}[1]{\textcolor[rgb]{0.73,0.13,0.13}{\textit{#1}}}
-\newcommand{\AnnotationTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
-\newcommand{\CommentVarTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
-\newcommand{\OtherTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{#1}}
-\newcommand{\FunctionTok}[1]{\textcolor[rgb]{0.02,0.16,0.49}{#1}}
-\newcommand{\VariableTok}[1]{\textcolor[rgb]{0.10,0.09,0.49}{#1}}
-\newcommand{\ControlFlowTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{\textbf{#1}}}
-\newcommand{\OperatorTok}[1]{\textcolor[rgb]{0.40,0.40,0.40}{#1}}
-\newcommand{\BuiltInTok}[1]{#1}
-\newcommand{\ExtensionTok}[1]{#1}
-\newcommand{\PreprocessorTok}[1]{\textcolor[rgb]{0.74,0.48,0.00}{#1}}
-\newcommand{\AttributeTok}[1]{\textcolor[rgb]{0.49,0.56,0.16}{#1}}
-\newcommand{\RegionMarkerTok}[1]{#1}
-\newcommand{\InformationTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
-\newcommand{\WarningTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
-\newcommand{\AlertTok}[1]{\textcolor[rgb]{1.00,0.00,0.00}{\textbf{#1}}}
 \newcommand{\ErrorTok}[1]{\textcolor[rgb]{1.00,0.00,0.00}{\textbf{#1}}}
+\newcommand{\ExtensionTok}[1]{#1}
+\newcommand{\FloatTok}[1]{\textcolor[rgb]{0.25,0.63,0.44}{#1}}
+\newcommand{\FunctionTok}[1]{\textcolor[rgb]{0.02,0.16,0.49}{#1}}
+\newcommand{\ImportTok}[1]{#1}
+\newcommand{\InformationTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
+\newcommand{\KeywordTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{\textbf{#1}}}
 \newcommand{\NormalTok}[1]{#1}
+\newcommand{\OperatorTok}[1]{\textcolor[rgb]{0.40,0.40,0.40}{#1}}
+\newcommand{\OtherTok}[1]{\textcolor[rgb]{0.00,0.44,0.13}{#1}}
+\newcommand{\PreprocessorTok}[1]{\textcolor[rgb]{0.74,0.48,0.00}{#1}}
+\newcommand{\RegionMarkerTok}[1]{#1}
+\newcommand{\SpecialCharTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
+\newcommand{\SpecialStringTok}[1]{\textcolor[rgb]{0.73,0.40,0.53}{#1}}
+\newcommand{\StringTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
+\newcommand{\VariableTok}[1]{\textcolor[rgb]{0.10,0.09,0.49}{#1}}
+\newcommand{\VerbatimStringTok}[1]{\textcolor[rgb]{0.25,0.44,0.63}{#1}}
+\newcommand{\WarningTok}[1]{\textcolor[rgb]{0.38,0.63,0.69}{\textbf{\textit{#1}}}}
 \setlength{\emergencystretch}{3em}  % prevent overfull lines
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}