https://superuser.com/questions/1247541/make-bash-completion-to-ignore-exe-extention-in-cygwin
https://superuser.com/questions/1072481/tab-completion-for-command-arguments-fail-in-cygwin-due-to-exe-suffix
https://github.com/scop/bash-completion/issues/164
# -q be quiet
# -z6 enables compression level 6
cvs -q -z6
# -P prune empty directories
co -P
# -u provides unified diff
# -p print to standard output
diff -up
rdiff -up
# -P prune empty directories
get -P
# Do not print the list of tags for this file. Can be very useful when your
# site uses a lot of tags.
log -N
# -P prune empty directories
# -d create new directories
update -Pd