gitweb: Update and improve gitweb/README file

diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index 5ce905de862253aa2bd2ed619819306165e978f0..d3f21c797596e9dc633293e0cca4a172940bd4af 100644 (file)
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -10,6 +10,7 @@ SYNOPSIS
 [verse]
 'git-branch' [--color | --no-color] [-r | -a]
           [-v [--abbrev=<length> | --no-abbrev]]
+          [--contains <commit>]
 'git-branch' [--track | --no-track] [-l] [-f] <branchname> [<start-point>]
 'git-branch' (-m | -M) [<oldbranch>] <newbranch>
 'git-branch' (-d | -D) [-r] <branchname>...
@@ -20,6 +21,9 @@ With no arguments given a list of existing branches
 will be shown, the current branch will be highlighted with an asterisk.
 Option `-r` causes the remote-tracking branches to be listed,
 and option `-a` shows both.
+With `--contains <commit>`, shows only the branches that
+contains the named commit (in other words, the branches whose
+tip commits are descendant of the named commit).
 
 In its second form, a new branch named <branchname> will be created.
 It will start out with a head equal to the one given as <start-point>.
@@ -45,17 +49,22 @@ to happen.
 
 With a `-d` or `-D` option, `<branchname>` will be deleted.  You may
 specify more than one branch for deletion.  If the branch currently
-has a reflog then the reflog will also be deleted. Use -r together with -d
-to delete remote-tracking branches.
+has a reflog then the reflog will also be deleted.
+
+Use -r together with -d to delete remote-tracking branches. Note, that it
+only makes sense to delete remote-tracking branches if they no longer exist
+in remote repository or if gitlink:git-fetch[1] was configured not to fetch
+them again. See also 'prune' subcommand of gitlink:git-remote[1] for way to
+clean up all obsolete remote-tracking branches.
 
 
 OPTIONS
 -------
 -d::
-       Delete a branch. The branch must be fully merged.
+       Delete a branch. The branch must be fully merged in HEAD.
 
 -D::
-       Delete a branch irrespective of its index status.
+       Delete a branch irrespective of its merged status.
 
 -l::
        Create the branch's reflog.  This activates recording of
@@ -153,9 +162,11 @@ $ git branch -d -r origin/todo origin/html origin/man   <1>
 $ git branch -D test                                    <2>
 ------------
 +
-<1> Delete remote-tracking branches "todo", "html", "man"
-<2> Delete "test" branch even if the "master" branch does not have all
-commits from test branch.
+<1> Delete remote-tracking branches "todo", "html", "man". Next 'fetch' or
+'pull' will create them again unless you configure them not to. See
+gitlink:git-fetch[1].
+<2> Delete "test" branch even if the "master" branch (or whichever branch is
+currently checked out) does not have all commits from test branch.
 
 
 Notes