Merge branch 'jx/fetch-atomic-error-message-fix' into maint-2.43

"git fetch --atomic" issued an unnecessary empty error message, which has been corrected. cf. <ZX__e7VjyLXIl-uV@tanuki> * jx/fetch-atomic-error-message-fix: fetch: no redundant error message for atomic fetch t5574: test porcelain output of atomic fetch