LaTeX writer: use \(..\) instead of $..$ for inline math.

Closes #1464.

src/Text/Pandoc/Writers/LaTeX.hs

@@ -742,7 +742,7 @@ inlineToLaTeX (Quoted qt lst) = do
                       else char '\x2018' <> inner <> char '\x2019'
 inlineToLaTeX (Str str) = liftM text $ stringToLaTeX TextString str
 inlineToLaTeX (Math InlineMath str) =
-  return $ char '$' <> text str <> char '$'
+  return $ "\\(" <> text str <> "\\)"
 inlineToLaTeX (Math DisplayMath str) =
   return $ "\\[" <> text str <> "\\]"
 inlineToLaTeX (RawInline f str)

tests/Tests/Writers/LaTeX.hs

@@ -46,7 +46,7 @@ tests = [ testGroup "code blocks"
           ]
         , testGroup "math"
           [ "escape |" =: para (math "\\sigma|_{\\{x\\}}") =?>
-            "$\\sigma|_{\\{x\\}}$"
+            "\\(\\sigma|_{\\{x\\}}\\)"
           ]
         , testGroup "headers"
           [ "unnumbered header" =:

tests/writer.latex

@@ -709,20 +709,20 @@ Ellipses\ldots{}and\ldots{}and\ldots{}.
 \item
   \cite[22-23]{smith.1899}
 \item
-  $2+2=4$
+  \(2+2=4\)
 \item
-  $x \in y$
+  \(x \in y\)
 \item
-  $\alpha \wedge \omega$
+  \(\alpha \wedge \omega\)
 \item
-  $223$
+  \(223\)
 \item
-  $p$-Tree
+  \(p\)-Tree
 \item
   Here's some display math:
   \[\frac{d}{dx}f(x)=\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}\]
 \item
-  Here's one that has a line break in it: $\alpha + \omega \times x^2$.
+  Here's one that has a line break in it: \(\alpha + \omega \times x^2\).
 \end{itemize}
 
 These shouldn't be math: