add gfm line breaks.

bin/marked

@@ -68,6 +68,12 @@ var main = function(argv) {
       case '--gfm':
         options.gfm = true;
         break;
+      case '--tables':
+        options.tables = true;
+        break;
+      case '--breaks':
+        options.breaks = true;
+        break;
       case '--sanitize':
         options.sanitize = true;
         break;

lib/marked.js

@@ -436,6 +436,7 @@ inline.normal = {
   url: inline.url,
   strong: inline.strong,
   em: inline.em,
+  br: inline.br,
   text: inline.text
 };
 
@@ -449,6 +450,11 @@ inline.gfm = {
   text: /^[\s\S]+?(?=[\\<!\[_*`]|https?:\/\/| {2,}\n|$)/
 };
 
+inline.gfm.breaks = {
+  br: replace(inline.br)('{2,}', '*')(),
+  text: replace(inline.gfm.text)('{2,}', '*')()
+};
+
 /**
  * Inline Lexer & Compiler
  */
@@ -465,6 +471,18 @@ function InlineLexer(links, options) {
     inline.url = inline.normal.url;
   }
 
+  if (this.options.gfm && this.options.breaks) {
+    inline.br = inline.gfm.breaks.br;
+    inline.text = inline.gfm.breaks.text;
+  } else {
+    inline.br = inline.normal.br;
+    if (this.options.gfm) {
+      inline.text = inline.gfm.text;
+    } else {
+      inline.text = inline.normal.text;
+    }
+  }
+
   if (this.options.pedantic) {
     inline.em = inline.pedantic.em;
     inline.strong = inline.pedantic.strong;
@@ -909,6 +927,7 @@ marked.setOptions = function(opt) {
 marked.defaults = {
   gfm: true,
   tables: true,
+  breaks: false,
   pedantic: false,
   sanitize: false,
   silent: false,