title: What to put into ~/.gitconfig to imply --show-signature for every git subcommand that supports it?
body: <p>I just searched through the <a href="https://git-scm.com/docs/git-config" rel="nofollow noreferrer"><code>git-config(1)</code></a>, <a href="https://git-scm.com/docs/git-log" rel="nofollow noreferrer"><code>git-log(1)</code></a> and <a href="https://git-scm.com/docs/git-show" rel="nofollow noreferrer"><code>git-show(1)</code></a> man pages of git 2.6.2, but haven't found any hint that the <code>--show-signature</code> option (to e.g. <code>git show</code> or <code>git log</code>) can be configured globally in my <code>~/.gitconfig</code> for all <code>git</code> subcommands that support it.</p>
  
  <p>One option would be aliases, but since I don't know which subcommands all support it, that's just a workaround, not a solution.</p>
  
  <p>I guessed it may be <code>core.show-signature = yes</code> or <code>core.showSignature = yes</code> but that didn't change anything.</p>