Since
a98457e66b ("vim:autocmd: Adjust colorcolumn with &textwidth")
or correctly sine
fc0969abba ("vim: Drop textwidth autocmd for native way")
it is not necessary to add the `textwidth` manually to `colorcolumn`.
The colorcolumns are now also placed *behind* textwidth.
Disable gutentags as it seems to regenerate the entire tags file when
editing git-commits, leading to a delay when exiting and a message from
git:
"Waiting for your editor to close the file..."
