difftool: fix word spacing in the usage strings

Remove spaces in `non - zero` and add a space between the diff
format/mode and option parentheses in difftool's usage strings.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Bagas Sanjaya
2021-09-21 18:17:13 +07:00
committed by Junio C Hamano
parent 225bc32a98
commit 51b04c05b7