[PATCH] Fix psql tab completion for REPACK boolean options

Hi,

I noticed that psql's tab completion for REPACK's parenthesized
boolean options (ANALYZE, CONCURRENTLY, VERBOSE) does not offer
ON/OFF after typing one of these keywords.
For example:
REPACK (VERBOSE <Tab> -- nothing offered
VACUUM (VERBOSE <Tab> -- correctly offers ON/OFF

The issue is in tab-complete.in.c. The code uses:

TailMatches("ANALYZE", "CONCURRENTLY", "VERBOSE")

With comma-separated arguments, TailMatches matches a sequence of
consecutive words. So this only matches when all three words appear
in order, which is not a valid REPACK syntax.

The fix is to use pipe-separated alternatives (matching any one of
the keywords), consistent with how VACUUM handles the same pattern:

TailMatches("ANALYZE|CONCURRENTLY|VERBOSE")

Patch attached.

Thanks,
Baji Shaik
AWS RDS