More precisely recognize ObjC method declarations.

Otherwise, +/- and the beginning of constants can be recognized
incorrectly.

Before:  #define A - 1
After:   #define A -1

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177725 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index dc77c77..051deeb 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -2067,6 +2067,8 @@
                "case -1:\n"
                "  break;\n"
                "}");
+  verifyFormat("#define X -1");
+  verifyFormat("#define X -kConstant");
 
   verifyFormat("const NSPoint kBrowserFrameViewPatternOffset = { -5, +3 };");
   verifyFormat("const NSPoint kBrowserFrameViewPatternOffset = { +5, -3 };");