Hmm... It seems the command I used for obtaining a patch I got from
here https://wiki.postgresql.org/wiki/Working_with_Git truncated part
of the patch. I've attached the file generated from git diff
--patience master improve-partial-index-correlation-calculation
--no-color > improve-correlated-partial-index-cost-v2.patch to this
email. What is the correct command for generating a context diff?