checksrc: warn for leading spaces before the hash

[bagder]

Fix the 40+ fallouts

[Copilot]

Pull request overview

This PR adds a new checksrc warning to detect and fix leading spaces before preprocessor directives (the # symbol). The PR implements the warning check and fixes all 40+ instances of this style violation found in the codebase.

Changes:

• Added CPPSPACE warning to checksrc.pl to detect leading spaces before preprocessor hash symbols
• Fixed all instances of improperly indented preprocessor directives across library files
• Updated test expectations to reflect the new warning

Reviewed changes

Copilot reviewed 2 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
scripts/checksrc.pl	Added CPPSPACE warning and detection logic for leading spaces before #
tests/data/test1185	Updated test expectations to include new CPPSPACE warning and incremented warning count
lib/vssh/libssh.c	Removed leading spaces from preprocessor directives
lib/vquic/curl_ngtcp2.c	Removed leading spaces from #error directive
lib/sha256.c	Removed leading spaces from preprocessor directives
lib/md5.c	Removed leading spaces from preprocessor directives
lib/md4.c	Removed leading spaces from nested preprocessor directives (using # define convention)
lib/http_negotiate.c	Removed leading spaces from preprocessor directives
lib/file.c	Removed leading spaces from preprocessor directives
lib/curl_ntlm_core.c	Removed leading spaces from nested preprocessor directives (using # define convention)

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