[libc] Mass replace enclosing namespace (#67032)

2023-09-26T09:45:04+00:00

This is step 4 of
https://discourse.llvm.org/t/rfc-customizable-namespace-to-allow-testing-the-libc-when-the-system-libc-is-also-llvms-libc/73079

[libc] Add a test for `fputs` to check using `stdout` and `stderr`

2023-06-16T16:01:55+00:00

This patch adds a test directly for the `fputs` function similar to the
existing `puts` test. This lets us know that the default file pointers
are function and the `fputs` interface works.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D152288

llvm-project.git/libc/test/src/stdio/fputs_test.cpp, branch main

[libc] Mass replace enclosing namespace (#67032)

[libc] Add a test for `fputs` to check using `stdout` and `stderr`