[PATCH] Add {start,end}with_lower methods to StringRef.

[Reid Kleckner]

================
Comment at: lib/Support/StringRef.cpp:56
@@ -51,2 +55,3 @@
+    return ascii_strncasecmp(Data, RHS.Data, Length);
   return Length < RHS.Length ? -1 : 1;
 }
----------------
This doesn't look like it matches the behavior of strcasecmp.  The most intuitive way to test this to me is to write a test that sorts an array of strings.


http://llvm-reviews.chandlerc.com/D2041