Merge pull request #25 from Angular-Wave/alert-autofix-451

Potential fix for code scanning alert no. 451: Inefficient regular expression

Author: tolyo

src/router/url/url-matcher.js

@@ -209,7 +209,7 @@ export class UrlMatcher {
     const placeholder =
       /([:*])([\w[\]]+)|\{([\w[\]]+)(?::\s*((?:[^{}\\]+|\\.|\{(?:[^{}\\]+|\\.)*\})+))?\}/g;
     const searchPlaceholder =
-      /([:]?)([\w[\].-]+)|\{([\w[\].-]+)(?::\s*((?:[^{}\\]+|\\.|\{(?:[^{}\\]+|\\.)*\})+))?\}/g;
+      /([:]?)([\w[\].-]+)|\{([\w[\].-]+)(?::\s*((?:[^{\\}]+|\\.|{(?:[^{\\}]+|\\.)*})+))?\}/g;
     const patterns = [];
     let last = 0;
     let matchArray;