line-range-format.txt: document -L/RE/ relative search
line-range-format.txt: document -L/RE/ relative search

Option -L/RE/ of blame/log now searches relative to the previous -L
range, if any. Document this.

Signed-off-by: Eric Sunshine <8d6e34f987851aa599257d3831a1af040886842f@sunshineco.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