fix f-string containing backslash

Author: 5chmidti

clang/utils/generate_ast_matcher_doc_tests.py

@@ -610,7 +610,10 @@ def build_test_case(self):
             res += "#if LLVM_HAS_NVPTX_TARGET\n"
 
         res += f"""TEST_P(ASTMatchersDocTest, docs_{self.line + 1}) {{
-    const StringRef Code = R"cpp(\n{"\t#include \"cuda.h\"\n" if has_cuda else ""}{self.code})cpp";\n"""
+    const StringRef Code = R"cpp(\n"""
+        if has_cuda:
+            res += '\t#include "cuda.h"\n'
+        res += f'{self.code})cpp";\n'
 
         if self.has_headers():
             res += f"\tconst FileContentMappings VirtualMappedFiles = {{{self.get_formated_headers()}}};"
@@ -1058,6 +1061,7 @@ def group_doc_comment_and_followed_code(
 
     return result
 
+
 test_file_begin = """
 // unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp - AST matcher unit tests//
 //
@@ -1117,6 +1121,7 @@ def group_doc_comment_and_followed_code(
 } // namespace clang
 """
 
+
 def main():
     args = parse_arguments()
 
@@ -1162,5 +1167,6 @@ def main():
 
         exit(1)
 
+
 if __name__ == "__main__":
     main()