doc: log, gitk: move '-L' description to 'line-range-options.txt'

The description of the '-L' option for `git log` and `gitk` is almost
the same, but is repeated in both 'git-log.txt' and 'gitk.txt' (the
difference being that 'git-log.txt' lists the option with a space
after '-L', while 'gitk.txt' lists it as stuck and notes that `gitk`
only understands the stuck form).

Reduce duplication by creating a new file, 'line-range-options.txt',
and include it in both files.

To simplify the presentation, only list the stuck form for both
commands, and remove the note about `gitk` only understanding the stuck
form.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-log.txt

@@ -77,20 +77,7 @@ produced by `--stat`, etc.
 	Intended to speed up tools that read log messages from `git log`
 	output by allowing them to allocate space in advance.
 
--L <start>,<end>:<file>::
+include::line-range-options.txt[]
--L :<funcname>:<file>::
-	Trace the evolution of the line range given by "<start>,<end>"
-	(or the function name regex <funcname>) within the <file>.  You may
-	not give any pathspec limiters.  This is currently limited to
-	a walk starting from a single revision, i.e., you may only
-	give zero or one positive revision arguments, and
-	<start> and <end> (or <funcname>) must exist in the starting revision.
-	You can specify this option more than once. Implies `--patch`.
-	Patch output can be suppressed using `--no-patch`, but other diff formats
-	(namely `--raw`, `--numstat`, `--shortstat`, `--dirstat`, `--summary`,
-	`--name-only`, `--name-status`, `--check`) are not currently implemented.
-+
-include::line-range-format.txt[]
 
 <revision range>::
 	Show only commits in the specified revision range.  When no

Documentation/gitk.txt

@@ -98,25 +98,7 @@ linkgit:git-rev-list[1] for a complete list.
 	(See "History simplification" in linkgit:git-log[1] for a more
 	detailed explanation.)
 
--L<start>,<end>:<file>::
+include::line-range-options.txt[]
--L:<funcname>:<file>::
-
-	Trace the evolution of the line range given by "<start>,<end>"
-	(or the function name regex <funcname>) within the <file>.  You may
-	not give any pathspec limiters.  This is currently limited to
-	a walk starting from a single revision, i.e., you may only
-	give zero or one positive revision arguments, and
-	<start> and <end> (or <funcname>) must exist in the starting revision.
-	You can specify this option more than once. Implies `--patch`.
-	Patch output can be suppressed using `--no-patch`, but other diff formats
-	(namely `--raw`, `--numstat`, `--shortstat`, `--dirstat`, `--summary`,
-	`--name-only`, `--name-status`, `--check`) are not currently implemented.
-+
-*Note:* gitk (unlike linkgit:git-log[1]) currently only understands
-this option if you specify it "glued together" with its argument.  Do
-*not* put a space after `-L`.
-+
-include::line-range-format.txt[]
 
 <revision range>::
 

Documentation/line-range-options.txt

@@ -0,0 +1,15 @@
+-L<start>,<end>:<file>::
+-L:<funcname>:<file>::
+
+	Trace the evolution of the line range given by "<start>,<end>"
+	(or the function name regex <funcname>) within the <file>.  You may
+	not give any pathspec limiters.  This is currently limited to
+	a walk starting from a single revision, i.e., you may only
+	give zero or one positive revision arguments, and
+	<start> and <end> (or <funcname>) must exist in the starting revision.
+	You can specify this option more than once. Implies `--patch`.
+	Patch output can be suppressed using `--no-patch`, but other diff formats
+	(namely `--raw`, `--numstat`, `--shortstat`, `--dirstat`, `--summary`,
+	`--name-only`, `--name-status`, `--check`) are not currently implemented.
++
+include::line-range-format.txt[]