Fix more exponential regular expressions

Author: marijnh

mode/erlang/erlang.js

@@ -339,8 +339,7 @@ CodeMirror.defineMode("erlang", function(cmCfg) {
   }
 
   function lookahead(stream) {
-    var m = stream.match(/([\n\s]+|%[^\n]*\n)*(.)/,false);
-    return m ? m.pop() : "";
+    return !stream.eol() ? m.pop() : "";
   }
 
   function is_member(element,list) {

mode/markdown/markdown.js

@@ -735,7 +735,7 @@ CodeMirror.defineMode("markdown", function(cmCfg, modeCfg) {
     if (stream.peek() === undefined) { // End of line, set flag to check next line
       state.linkTitle = true;
     } else { // More content on line, check if link title
-      stream.match(/^(?:\s+(?:"(?:[^"\\]|\\\\|\\.)+"|'(?:[^'\\]|\\\\|\\.)+'|\((?:[^)\\]|\\.)+\)))?/, true);
+      stream.match(/^(?:\s+(?:"(?:[^"\\]|\\.)+"|'(?:[^'\\]|\\.)+'|\((?:[^)\\]|\\.)+\)))?/, true);
     }
     state.f = state.inline = inlineNormal;
     return tokenTypes.linkHref + " url";

mode/python/python.js

@@ -282,7 +282,7 @@
     }
 
     function pushBracketScope(stream, state, type) {
-      var align = stream.match(/^([\s\[\{\(]|#.*)*$/, false) ? null : stream.column() + 1
+      var align = stream.match(/^[\s\[\{\(]*(?:#|$)/, false) ? null : stream.column() + 1
       state.scopes.push({offset: state.indent + hangingIndent,
                          type: type,
                          align: align})