CodingGuidelines: update 'rough' rule count
CodingGuidelines: update 'rough' rule count

Changed inaccurate count of "rough rules" from three to the more
generic 'a few'.

Signed-off-by: Julian Gindi <9504c2899c354c12d71102fb1c0c845197211568@gmail.com>
Reviewed-by: Eric Sunshine <8d6e34f987851aa599257d3831a1af040886842f@sunshineco.com>
Reviewed-by: Jonathan Nieder <b57189c5f2fd5b3daf3350a77fde90def1080fa5@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git