Fix indentation in kittens/custom.rst to 4 spaces

This file used 3 spaces some places and 4 spaces other places. Other
files like diff.rst and hints.rst use 4 spaces.
This commit is contained in:
Trygve Aaberge 2020-04-12 16:04:32 +02:00
parent b4d08044a0
commit b19472e0f5