fix up apiaryio#7

src/StringUtility.h

@@ -22,31 +22,21 @@
 namespace snowcrash {
 
     // Check a character not to be an space of any kind
-    inline bool isSpace(char i){
+    inline bool isSpace(const char i){
         if(i == ' ' || i == '\t' || i == '\n' || i == '\v' || i == '\f' || i == '\r')
             return true;
         return false;
     }
 
     // Trim string from start
     inline std::string& TrimStringStart(std::string &s) {
-        std::string::iterator it;
-        for (it = s.begin() ; it < s.end() ; ++it){
-            if(!isSpace(*it))
-                break;
-        }
-        s.erase(s.begin(), it);
+        s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun(isSpace))));
         return s;
     }
 
     // Trim string from end
     inline std::string& TrimStringEnd(std::string &s) {
-        std::string::iterator it;
-        for (it = s.end()-1 ; it > s.begin() ; --it){
-            if(!isSpace(*it))
-                break;
-        }
-        s.erase(it+1 , s.end());
+        s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun(isSpace))).base(), s.end());
         return s;
     }