Subject: 27.0.50; Duplicate lines in xref output

From: Juri Linkov <[email-masked]>
Date: Thu, 08 Aug 2019 00:52:13 +0300

I tried to use project-find-regexp more often than rgrep,
but unfortunately xref still has a fundamental flaw:

0. emacs -Q
1. M-x project-find-regexp RET regexp RET
2. The output buffer *xref* contains duplicate lines
   when regexp is found on the same line several times,
   each duplicate output line has separate highlighting
   for every regexp occurrence.