Updating comments of CamelCase Function (mlpack#3854)

* Optimize CamelCase function

* removal of unnecessary changes

src/mlpack/bindings/util/camel_case.hpp

@@ -33,14 +33,14 @@ inline std::string CamelCase(std::string s, bool lower)
   size_t resInd = 0;
   for (size_t i = 0; i < n; i++)
   {
-    // Check for spaces in the sentence.
+    // Check for underscores in the string.
     if (s[i] == '_')
     {
       // Conversion into upper case.
       s[i + 1] = toupper(s[i + 1]);
       continue;
     }
-    // If not space, copy character.
+    // If not underscore, copy character.
     else
       s[resInd++] = s[i];
   }