Fix typo correction of one qualified name to another.

When suggesting "foo::bar" as a correction for "fob::bar" we mistakenly
replaced only "bar" with "foo::bar" producing "fob::foo::bar" which was broken.

This corrects that replacement in as many places as I could find & provides
test cases for all those cases I could find a test case for. There are a couple
that don't seem to be reachable (one looks entirely dead, the other just
doesn't seem to ever get called with a namespace to namespace change).

Review by Richard Smith ( http://llvm-reviews.chandlerc.com/D57 ).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165817 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 12452b2..8d891a3 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -5811,7 +5811,8 @@
     if (DeclContext *DC = S.computeDeclContext(SS, false))
       S.Diag(IdentLoc, diag::err_using_directive_member_suggest)
         << Ident << DC << CorrectedQuotedStr << SS.getRange()
-        << FixItHint::CreateReplacement(IdentLoc, CorrectedStr);
+        << FixItHint::CreateReplacement(Corrected.getCorrectionRange(),
+                                        CorrectedStr);
     else
       S.Diag(IdentLoc, diag::err_using_directive_suggest)
         << Ident << CorrectedQuotedStr