page [feature-comparison](https://beyondgrep.com/feature-comparison/) does not list which PCRE based tools accept `\Q\E` in the search RE pattern. (\L\F\U also possible...) ( re https://github.com/beyondgrep/ack3/issues/323 )
page feature-comparison does not list which PCRE based tools accept
\Q\Ein the search RE pattern. (\L\F\U also possible...)( re beyondgrep/ack3#323 )