Update the git-ls-tree documentation

This patch aims to freshen up a bit the git-ls-tree documentation. It hints
that the list of paths are in fact patterns to be matched, explains the new
-t, --name-only and --name-status options, corrects the original autorship
information to refer to yours sincerely, corrects several grammar mistakes,
etc.

Since the documentation still deserves some significant work (at least
proper description of the pattern matching), I also added the stub notice.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-ls-tree.txt

@@ -8,12 +8,15 @@ git-ls-tree - Lists the contents of a tree object.
 
 SYNOPSIS
 --------
-'git-ls-tree' [-d] [-r] [-z] <tree-ish> [paths...]
+'git-ls-tree' [-d] [-r] [-t] [-z] [--name-only] [--name-status] <tree-ish> [paths...]
 
 DESCRIPTION
 -----------
-Lists the contents of a tree object, like what "/bin/ls -a" does
+Lists the contents of a given tree object, like what "/bin/ls -a" does
-in the current working directory.
+in the current working directory. Note that the usage is subtly different,
+though - 'paths' denote just a list of patterns to match, e.g. so specifying
+directory name (without '-r') will behave differently, and order of the
+arguments does not matter.
 
 OPTIONS
 -------
@@ -21,36 +24,48 @@ OPTIONS
 	Id of a tree-ish.
 
 -d::
-	show only the named tree entry itself, not its children
+	Show only the named tree entry itself, not its children.
 
 -r::
-	recurse into sub-trees
+	Recurse into sub-trees.
+
+-t::
+	Show tree entries even when going to recurse them. Has no effect
+	if '-r' was not passed. '-d' implies '-t'.
 
 -z::
-	\0 line termination on output
+	\0 line termination on output.
+
+--name-only::
+--name-status::
+	List only filenames (instead of the "long" output), one per line.
 
 paths::
-	When paths are given, show them.  Otherwise implicitly
+	When paths are given, show them (note that this isn't really raw
-	uses the root level of the tree as the sole path argument.
+	pathnames, but rather a list of patterns to match).  Otherwise
+	implicitly uses the root level of the tree as the sole path argument.
 
 
 Output Format
 -------------
         <mode> SP <type> SP <object> TAB <file>
 
-When `-z` option is not used, TAB, LF, and backslash characters
+When the `-z` option is not used, TAB, LF, and backslash characters
-in pathnames are represented as `\t`, `\n`, and `\\`,
+in pathnames are represented as `\t`, `\n`, and `\\`, respectively.
-respectively.
 
 
 Author
 ------
-Written by Linus Torvalds <torvalds@osdl.org>
+Written by Petr Baudis <pasky@suse.cz>
-Completely rewritten from scratch by Junio C Hamano <junkio@cox.net>
+Completely rewritten from scratch by Junio C Hamano <junkio@cox.net>,
+another major rewrite by Linus Torvalds <torvalds@osdl.org>
 
 Documentation
 --------------
-Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.
+Documentation by David Greaves, Junio C Hamano and the git-list
+<git@vger.kernel.org>.
+
+This manual page is a stub. You can help the git documentation by expanding it.
 
 GIT
 ---