The "test-match" command:

Usage: fossil test-match SEARCHSTRING FILE1 FILE2 ...

Run the full-scan search algorithm using SEARCHSTRING against
the text of the files listed.  Output matches and snippets.

Options:

   --begin TEXT        Text to insert before each match
   --end TEXT          Text to insert after each match
   --gap TEXT          Text to indicate elided content
   --html              Input is HTML
   --static            Use the static Search object