Commit 4f3b38f

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Get rid of explicit argument-count markings in tab-complete.c.

This replaces the "TailMatchesN" macros with just "TailMatches", and likewise "HeadMatchesN" becomes "HeadMatches" and "MatchesN" becomes "Matches". The various COMPLETE_WITH_LISTn macros are reduced to COMPLETE_WITH, and the single-item COMPLETE_WITH_CONST also gets folded into that. This eliminates a lot of minor annoyance in writing tab-completion rules. Usefully, the compiled code also gets a bit smaller (10% or so, on my machine). The implementation depends on variadic macros, so we couldn't have done this before we required C99. Andres Freund and Thomas Munro; some cosmetic cleanup by me. Discussion: https://postgr.es/m/d8jo9djvm7h.fsf@dalvik.ping.uio.no

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src
- bin/psql
  - tab-complete.c
- include
  - c.h

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+1222

-1362

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