Added coding style modes to SimpleMDE (#3286)

* Added coding style modes to SimpleMDE

* Moved the CodeMirror addon from simplemd to codemirror directory

public/plugins/codemirror-5.17.0/mode/xml/test.js

@@ -0,0 +1,51 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function() {
+  var mode = CodeMirror.getMode({indentUnit: 2}, "xml"), mname = "xml";
+  function MT(name) { test.mode(name, mode, Array.prototype.slice.call(arguments, 1), mname); }
+
+  MT("matching",
+     "[tag&bracket <][tag top][tag&bracket >]",
+     "  text",
+     "  [tag&bracket <][tag inner][tag&bracket />]",
+     "[tag&bracket </][tag top][tag&bracket >]");
+
+  MT("nonmatching",
+     "[tag&bracket <][tag top][tag&bracket >]",
+     "  [tag&bracket <][tag inner][tag&bracket />]",
+     "  [tag&bracket </][tag&error tip][tag&bracket&error >]");
+
+  MT("doctype",
+     "[meta <!doctype foobar>]",
+     "[tag&bracket <][tag top][tag&bracket />]");
+
+  MT("cdata",
+     "[tag&bracket <][tag top][tag&bracket >]",
+     "  [atom <![CDATA[foo]",
+     "[atom barbazguh]]]]>]",
+     "[tag&bracket </][tag top][tag&bracket >]");
+
+  // HTML tests
+  mode = CodeMirror.getMode({indentUnit: 2}, "text/html");
+
+  MT("selfclose",
+     "[tag&bracket <][tag html][tag&bracket >]",
+     "  [tag&bracket <][tag link] [attribute rel]=[string stylesheet] [attribute href]=[string \"/foobar\"][tag&bracket >]",
+     "[tag&bracket </][tag html][tag&bracket >]");
+
+  MT("list",
+     "[tag&bracket <][tag ol][tag&bracket >]",
+     "  [tag&bracket <][tag li][tag&bracket >]one",
+     "  [tag&bracket <][tag li][tag&bracket >]two",
+     "[tag&bracket </][tag ol][tag&bracket >]");
+
+  MT("valueless",
+     "[tag&bracket <][tag input] [attribute type]=[string checkbox] [attribute checked][tag&bracket />]");
+
+  MT("pThenArticle",
+     "[tag&bracket <][tag p][tag&bracket >]",
+     "  foo",
+     "[tag&bracket <][tag article][tag&bracket >]bar");
+
+})();