The "blame" command:
Usage: fossil (annotate|blame|praise) ?OPTIONS? FILENAME
Output the text of a file with markings to show when each line of
the file was last modified. The "annotate" command shows line numbers
and omits the username. The "blame" and "praise" commands show the user
who made each check-in and omits the line number.
Options:
--filevers Show file version numbers rather than
check-in versions
-l|--log List all versions analyzed
-n|--limit N Only look backwards in time by N versions
-w|--ignore-all-space Ignore white space when comparing lines
-Z|--ignore-trailing-space Ignore whitespace at line end
See also: info, finfo, timeline