test/Preprocessor/indent_macro.c - clang - Git at Google

 // RUN: clang-cc -E %s | grep '^   zzap$'

 // zzap is on a new line, should be indented.
 #define BLAH  zzap
    BLAH
	// RUN: clang-cc -E %s \| grep '^ zzap$'

	// zzap is on a new line, should be indented.
	#define BLAH zzap
	BLAH