test/Preprocessor/stringize_space.c - third_party/swift-clang - Git at Google

 // RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s

 #define A(b) -#b  ,  - #b  ,  -# b  ,  - # b
 A()

 // CHECK: {{^}}-"" , - "" , -"" , - ""{{$}}


 #define t(x) #x
 t(a
 c)

 // CHECK: {{^}}"a c"{{$}}
	// RUN: %clang_cc1 -E %s \| FileCheck --strict-whitespace %s

	#define A(b) -#b , - #b , -# b , - # b
	A()

	// CHECK: {{^}}-"" , - "" , -"" , - ""{{$}}


	#define t(x) #x
	t(a
	c)

	// CHECK: {{^}}"a c"{{$}}