bugfix: ruby code-gen capitalization
	Change on 2015/01/06 by temiola <temiola@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=83391912
diff --git a/src/compiler/ruby_generator_string-inl.h b/src/compiler/ruby_generator_string-inl.h
index f74f2c7..85a76fa 100644
--- a/src/compiler/ruby_generator_string-inl.h
+++ b/src/compiler/ruby_generator_string-inl.h
@@ -93,12 +93,11 @@
   return true;
 }
 
-// CapitalizeString capitalizes a string.
-inline string CapitalizeString(string s) {
-  if (!s.empty()) {
+// CapitalizeFirst capitalizes the first char in a string.
+inline string CapitalizeFirst(string s) {
+  if (s.empty()) {
     return s;
   }
-  transform(s.begin(), s.end(), s.begin(), ::tolower);
   s[0] = ::toupper(s[0]);
   return s;
 }
@@ -117,7 +116,7 @@
         res += "::";  // switch '.' to the ruby module delim
       }
       if (i < prefixes_and_type.size() - 1) {
-        res += CapitalizeString(prefixes_and_type[i]);  // capitalize pkgs
+        res += CapitalizeFirst(prefixes_and_type[i]);  // capitalize pkgs
       } else {
         res += prefixes_and_type[i];
       }