tidy-up: miscellaneous

- badwords: replace stray synonyms with 'null-terminator'.
- tests/FILEFORMAT.md: tidy up feature descriptions.
- printf: replace stray `%i` masks with `%d` for consistency.
- pytest: add comments for empty excepts to try silencing GitHub CodeQL
  warnings.
- tool1394, unit1675: merge nested `if`s.
- dnscache: fix typo in comment.
- fix whitespace, indent and newlines.

Closes #21921

lib/progress.c

@@ -262,8 +262,8 @@ static const char *pgrs_timer_name(timerid timer)
     return pgrs_timer_names[(size_t)timer];
   return "?";
 }
-
 #endif /* CURLVERBOSE */
+
 /*
  * Curl_pgrsTimeWas(). Store the timestamp time at the given label.
  */