Documentation for delimited code blocks.

git-svn-id: https://pandoc.googlecode.com/svn/trunk@1208 788f1e2b-df1e-0410-8736-df70ead52e1b

README

@@ -452,8 +452,8 @@ with `~~`. Thus, for example,
 
     This ~~is deleted text.~~
 
-Lists
------
+Nested Lists
+------------
 
 Pandoc behaves differently from standard markdown on some "edge
 cases" involving lists.  Consider this source: 
@@ -477,6 +477,9 @@ Pandoc works this way even when the `--strict` option is specified. This
 behavior is consistent with the official markdown syntax description,
 even though it is different from that of `Markdown.pl`.)
 
+Ordered Lists
+-------------
+
 Unlike standard markdown, Pandoc allows ordered list items to be marked
 with uppercase and lowercase letters and roman numerals, in addition to
 arabic numerals. (This behavior can be turned off using the `--strict`
@@ -705,6 +708,52 @@ These work like simple tables, but with the following differences:
   - They must end with a row of dashes, then a blank line.
   - The rows must be separated by blank lines. 
 
+Delimited Code blocks
+---------------------
+
+In addition to standard indented code blocks, Pandoc supports
+*delimited* code blocks.  These begin with a row of three or more
+tildes (`~`) and end with a row of tildes that must be at least
+as long as the starting row.  Everything between the tilde-lines
+is treated as code.  No indentation is necessary:
+
+    ~~~~~~~
+    {code here}
+    ~~~~~~~
+
+If the code itself contains a row of tildes, just use a longer
+row of tildes at the start and end:
+
+    ~~~~~~~~~~~~~~~~
+    ~~~~~~~~~~
+    code including tildes
+    ~~~~~~~~~~
+    ~~~~~~~~~~~~~~~~
+
+Optionally, you may specify the language of the code block using
+this syntax:
+
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.haskell}
+    qsort []     = []
+    qsort (x:xs) = qsort (filter (< x) xs) ++ [x] ++
+                   qsort (filter (>= x) xs) 
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Some output formats can use this information to do syntax highlighting.
+Currently, the only output format that uses this information is HTML.
+The code block above would appear in the context
+
+    <pre class="haskell">
+      <code>
+      ...
+      </code>
+    </pre>
+
+This allows the HTML to be postprocessed using a syntax highlighting tool.
+(Pandoc itself does not do any syntax highlighting.) Note that multiple
+classes can be specified: for example, one might use `{.haskell
+.number}` to specify that lines be numbered in the highlighted output.
+
 Title blocks
 ------------