Clean up wording in usage
@@ -15,7 +15,7 @@ static void usage() {
fprintf(stderr,
"Usage: tui [options] [file]\n\n"
"Options:\n"
- " --margins <number> Add cosmetic margins.\n"
+ " --margins <number> Set cosmetic margins.\n"
" Default: 2\n"
" -h or --help Print this message and exit.\n"
);
