Fix a bug in StringPrintf() that caused it to not print large strings properly.

R=nilton
DELTA=1  (0 added, 0 deleted, 1 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=2886


git-svn-id: https://gflags.googlecode.com/svn/trunk@59 6586e3c6-dcc4-952a-343f-ff74eb82781d

src/util.h

@@ -287,7 +287,7 @@ inline void InternalStringPrintf(std::string* output, const char* format,
     va_end(backup_ap);
 
     if ((bytes_written >= 0) && (bytes_written < length)) {
-      output->append(space, bytes_written);
+      output->append(buf, bytes_written);
       delete[] buf;
       return;
     }