Re: bug#51969: 29.0.50; Add command for refilling ERC buffers

The need for such a command has probably dwindled with the arrival of
`erc-fill-wrap' (bug#60936). That said, it would still be nice to have a
way to refill an entire buffer, which can help when

  - switching between legacy fill styles
  - toggling `truncate-lines' to read pre-formatted text
  - recovering from a mishap

OTOH, it might not be easily achievable because other hooks that run
alongside `erc-fill' sometimes perform additional formatting. And it
doesn't seem like a module's place to be managing the membership and
ordering of hooks it doesn't own (beyond subscribing/unsubscribing).

Anyway, I'm closing this for no specific reason (call it lack of
initiative).