[NFC][libc++][test] Minor updates to generated header version test.

Adjusting the existing script to match the new output makes it easy to
review the new script works correctly.

This adjusts the tests to match the changes in the new tests,
Notably
- removes the synopsis
 uses 2 spaces indent in `# if`

It does not implement the conditional include part. This would be quite
some effort and these diffs are easy to review manually.

Note there are no tests for the changes; the existing script will be
phased out when the next generators are complete.

Author: mordante

libcxx/test/std/language.support/support.limits/support.limits.general/algorithm.version.compile.pass.cpp

@@ -5,70 +5,69 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
-//
-// WARNING: This test was generated by generate_feature_test_macro_components.py
+
+// WARNING: This test was generated by
+// generate_feature_test_macro_components.py
 // and should not be edited manually.
-//
-// clang-format off
 
 // <any>
 
 // Test the feature test macros defined by <any>
 
-/*  Constant         Value
-    __cpp_lib_any    201606L [C++17]
-*/
+// clang-format off
 
 #include <any>
 #include "test_macros.h"
 
 #if TEST_STD_VER < 14
 
-# ifdef __cpp_lib_any
-#   error "__cpp_lib_any should not be defined before c++17"
-# endif
+#  ifdef __cpp_lib_any
+#    error "__cpp_lib_any should not be defined before c++17"
+#  endif
 
 #elif TEST_STD_VER == 14
 
-# ifdef __cpp_lib_any
-#   error "__cpp_lib_any should not be defined before c++17"
-# endif
+#  ifdef __cpp_lib_any
+#    error "__cpp_lib_any should not be defined before c++17"
+#  endif
 
 #elif TEST_STD_VER == 17
 
-# ifndef __cpp_lib_any
-#   error "__cpp_lib_any should be defined in c++17"
-# endif
-# if __cpp_lib_any != 201606L
-#   error "__cpp_lib_any should have the value 201606L in c++17"
-# endif
+#  ifndef __cpp_lib_any
+#    error "__cpp_lib_any should be defined in c++17"
+#  endif
+#  if __cpp_lib_any != 201606L
+#    error "__cpp_lib_any should have the value 201606L in c++17"
+#  endif
 
 #elif TEST_STD_VER == 20
 
-# ifndef __cpp_lib_any
-#   error "__cpp_lib_any should be defined in c++20"
-# endif
-# if __cpp_lib_any != 201606L
-#   error "__cpp_lib_any should have the value 201606L in c++20"
-# endif
+#  ifndef __cpp_lib_any
+#    error "__cpp_lib_any should be defined in c++20"
+#  endif
+#  if __cpp_lib_any != 201606L
+#    error "__cpp_lib_any should have the value 201606L in c++20"
+#  endif
 
 #elif TEST_STD_VER == 23
 
-# ifndef __cpp_lib_any
-#   error "__cpp_lib_any should be defined in c++23"
-# endif
-# if __cpp_lib_any != 201606L
-#   error "__cpp_lib_any should have the value 201606L in c++23"
-# endif
+#  ifndef __cpp_lib_any
+#    error "__cpp_lib_any should be defined in c++23"
+#  endif
+#  if __cpp_lib_any != 201606L
+#    error "__cpp_lib_any should have the value 201606L in c++23"
+#  endif
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_any
-#   error "__cpp_lib_any should be defined in c++26"
-# endif
-# if __cpp_lib_any != 201606L
-#   error "__cpp_lib_any should have the value 201606L in c++26"
-# endif
+#  ifndef __cpp_lib_any
+#    error "__cpp_lib_any should be defined in c++26"
+#  endif
+#  if __cpp_lib_any != 201606L
+#    error "__cpp_lib_any should have the value 201606L in c++26"
+#  endif
 
 #endif // TEST_STD_VER > 23
 
+// clang-format on
+