mysql: fix checksum
Uniqify tags when merging dependencies
ghostscript: use optional dep for x11
Yield correct dependent when expanding requirements
Note which formula's requirements failed

Closes #20713.
emacs: shrink caveats

Remove caveats that duplicate option descriptions.
git-flow-completion 0.4.2.2

Closes #20775.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>