[CodeComplete] Add whitespace around braces in lambda completions

This produces nicer output.
Trivial follow-up to r361461, so sending without review.

llvm-svn: 361645
diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index 27e6842..f5e5a84 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -4177,8 +4177,11 @@
     };
     Completion.AddChunk(CodeCompletionString::CK_RightParen);
   }
+  Completion.AddChunk(clang::CodeCompletionString::CK_HorizontalSpace);
   Completion.AddChunk(CodeCompletionString::CK_LeftBrace);
+  Completion.AddChunk(CodeCompletionString::CK_HorizontalSpace);
   Completion.AddPlaceholderChunk("body");
+  Completion.AddChunk(CodeCompletionString::CK_HorizontalSpace);
   Completion.AddChunk(CodeCompletionString::CK_RightBrace);
 
   Results.AddResult(Completion.TakeString());