update annotation

lib/types/path.js

@@ -169,7 +169,7 @@ function buildRegex (hostTemplate, basePathPrefix, path, isCaseSensitive) {
   }
 
   /**
-   * To support parameter name with dash(-), replace the parameter names to array index , and will restore the name in the result object later.
+   * To support parameter name with dash(-), replace the parameter names to array index , and will restore the name in the result object regexp later.
    * It caused by a design issue in pathToRegexp library that the parameter names must use "word characters" ([A-Za-z0-9_]).
    * for more details,see https://github.com/pillarjs/path-to-regexp
    **/