Merge branch 'es/blame-L-breakage'

The refactoring made for parsing "-L" option recently to support "git log -L" seems to have broken "git blame -L X,-5" to show 5 lines leading to X. * es/blame-L-breakage: blame-options.txt: explain that -L <start> and <end> are optional blame-options.txt: place each -L option variation on its own line t8001/t8002 (blame): add blame -L :funcname tests t8001/t8002 (blame): add blame -L tests t8001/t8002 (blame): modernize style line-range: fix "blame -L X,-N" regression