Documentation / config / grep.txton commit documentation: mention --no-use-mailmap and log.mailmap false setting (2d9c569)
   1grep.lineNumber::
   2        If set to true, enable `-n` option by default.
   3
   4grep.column::
   5        If set to true, enable the `--column` option by default.
   6
   7grep.patternType::
   8        Set the default matching behavior. Using a value of 'basic', 'extended',
   9        'fixed', or 'perl' will enable the `--basic-regexp`, `--extended-regexp`,
  10        `--fixed-strings`, or `--perl-regexp` option accordingly, while the
  11        value 'default' will return to the default matching behavior.
  12
  13grep.extendedRegexp::
  14        If set to true, enable `--extended-regexp` option by default. This
  15        option is ignored when the `grep.patternType` option is set to a value
  16        other than 'default'.
  17
  18grep.threads::
  19        Number of grep worker threads to use.
  20        See `grep.threads` in linkgit:git-grep[1] for more information.
  21
  22grep.fallbackToNoIndex::
  23        If set to true, fall back to git grep --no-index if git grep
  24        is executed outside of a git repository.  Defaults to false.