Warn if RubyGems version explicitly set in gemspec does not match running version #7460
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What was the end-user or developer problem that led to this PR?
This gets in the middle if we ever start allowing to build as if using a different RubyGems version than the one being run.
This could be useful to make
gem rebuild
a little more usable, and it's already done by Bundler specs which already make this method a noop when they need this.I'm not sure forcefully setting this, even if user explicitly specified something else is helpful.
What is your fix for the problem, implemented in this PR?
Since this could potentially prevent gems explicitly setting a constant RubyGems version from building, I changed the error of incorrect RubyGems version from a hard error to a warning, since it will start happening in those cases if we stop overwriting the version.
Make sure the following tasks are checked