[Perl/perl5] 4a11c5: Write an apidoc fragment for wrap_infix_plugin()

[Paul Evans via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 4a11c5038c1bc1658830693613f56025e947d9be
      
https://github.com/Perl/perl5/commit/4a11c5038c1bc1658830693613f56025e947d9be
  Author: Paul "LeoNerd" Evans <leon...@leonerd.org.uk>
  Date:   2022-12-14 (Wed, 14 Dec 2022)

  Changed paths:
    M toke.c

  Log Message:
  -----------
  Write an apidoc fragment for wrap_infix_plugin()