allow multiline annotations

lib/ace/css/editor.css

@@ -242,6 +242,8 @@
     -webkit-box-sizing: border-box;
     box-sizing: border-box;
     cursor: default;
+    white-space: pre-line;
+    word-wrap: break-word;
 }
 
 .ace_folding-enabled > .ace_gutter-cell {

lib/ace/layer/gutter.js

@@ -33,6 +33,7 @@ define(function(require, exports, module) {
 
 var dom = require("../lib/dom");
 var oop = require("../lib/oop");
+var lang = require("../lib/lang");
 var EventEmitter = require("../lib/event_emitter").EventEmitter;
 
 var Gutter = function(parentEl) {
@@ -78,12 +79,15 @@ var Gutter = function(parentEl) {
             var annotation = annotations[i];
             var row = annotation.row;
             var rowInfo = this.$annotations[row];
-            if (!rowInfo) {
+            if (!rowInfo)
                 rowInfo = this.$annotations[row] = {text: []};
-            }
-            var annoText = annotation.text.replace(/"/g, "&quot;").replace(/'/g, "&#8217;").replace(/</g, "&lt;");
+           
+            var annoText = annotation.text;
+            annoText = annoText ? lang.escapeHTML(annoText) : annotation.html || "";
+
             if (rowInfo.text.indexOf(annoText) === -1)
                 rowInfo.text.push(annoText);
+
             var type = annotation.type;
             if (type == "error")
                 rowInfo.className = " ace_error";

lib/ace/lib/lang.js

@@ -117,6 +117,10 @@ exports.escapeRegExp = function(str) {
     return str.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1');
 };
 
+exports.escapeHTML = function(str) {
+    return str.replace(/&/g, "&#38;").replace(/"/g, "&#34;").replace(/'/g, "&#39;").replace(/</g, "&#60;");
+};
+
 exports.getMatchOffsets = function(string, regExp) {
     var matches = [];