Add basic parsing of definition lists.

lib/markdown.js

@@ -1081,6 +1081,43 @@ Markdown.dialects.Maruku.block.block_meta = function block_meta( block, next ) {
   return result;
 }
 
+Markdown.dialects.Maruku.block.definition_list = function definition_list( block, next ) {
+  // one or more terms followed by one or more definitions, in a single block
+  var tight = /^((?:[^\s:].*\n)+):\s+([^]+)$/,
+      list = [ "dl" ];
+
+  // see if we're dealing with a tight or loose block
+  if ( ( m = block.match( tight ) ) ) {
+    // pull subsequent tight DL blocks out of `next`
+    var blocks = [ block ];
+    while ( next.length && tight.exec( next[ 0 ] ) ) {
+      blocks.push( next.shift() );
+    }
+
+    for ( var b = 0; b < blocks.length; ++b ) {
+      var m = blocks[ b ].match( tight ),
+          terms = m[ 1 ].replace( /\n$/, "" ).split( /\n/ ),
+          defns = m[ 2 ].split( /\n:\s+/ );
+
+      // print( uneval( m ) );
+
+      for ( var i = 0; i < terms.length; ++i ) {
+        list.push( [ "dt", terms[ i ] ] );
+      }
+
+      for ( var i = 0; i < defns.length; ++i ) {
+        // run inline processing over the definition
+        list.push( [ "dd" ].concat( this.processInline( defns[ i ].replace( /(\n)\s+/, "$1" ) ) ) );
+      }
+    }
+  }
+  else {
+    return undefined;
+  }
+
+  return [ list ];
+}
+
 Markdown.dialects.Maruku.inline[ "{:" ] = function inline_meta( text, matches, out ) {
   if ( !out.length ) {
     return [ 2, "{:" ];