pgsql: Fix some mentions to memory units in postgresql.conf.sample

Fix some mentions to memory units in postgresql.conf.sample The default unit for max_slot_wal_keep_size is megabytes. While on it, also change temp_file_limit to use a more consistent wording. Reported-by: Jeff Janes, Fujii Masao Author: Kyotaro Horiguchi Discussion: https://postgr.es/m/CAMkU=1

pgsql: Remove some tabs in SQL code in C string literals

Remove some tabs in SQL code in C string literals This is not handled uniformly throughout the code, but at least nearby code can be consistent. Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/0a737be03cf7708e8e27f9596be3406275ec3d49 Modified Files -- s