SemaDeclCXX.cpp: Dissolve a ligature "fi" in comment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186523 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index c121efa..d0a80bd 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -590,7 +590,7 @@
   }
 
   // C++11 [dcl.fct.default]p4: If a friend declaration specifies a default
-  // argument expression, that declaration shall be a definition and shall be
+  // argument expression, that declaration shall be a definition and shall be
   // the only declaration of the function or function template in the
   // translation unit.
   if (Old->getFriendObjectKind() == Decl::FOK_Undeclared &&