ls-tree manpage: use "unless" instead of "when ... is not"

diff --git a/Documentation/gitk.txt b/Documentation/gitk.txt
index 6e827cd11c6d464e1369bf1ca23af0dd53b9be32..5ef3687e3941adaeb652b161d7488aaed942d9d3 100644 (file)
--- a/Documentation/gitk.txt
+++ b/Documentation/gitk.txt
@@ -21,7 +21,7 @@ git repository.
 
 OPTIONS
 -------
-To control which revisions to shown, the command takes options applicable to
+To control which revisions to show, the command takes options applicable to
 the 'git-rev-list' command (see linkgit:git-rev-list[1]).
 This manual page describes only the most
 frequently used options.
@@ -49,6 +49,13 @@ frequently used options.
        the history between two branches (i.e. the HEAD and the MERGE_HEAD)
        that modify the conflicted files.
 
+--argscmd=<command>::
+       Command to be run each time gitk has to determine the list of
+       <revs> to show.  The command is expected to print on its standard
+       output a list of additional revs to be shown, one per line.
+       Use this instead of explicitly specifying <revs> if the set of
+       commits to show may vary between refreshes.
+
 <revs>::
 
        Limit the revisions to show. This can be either a single revision
@@ -68,7 +75,7 @@ Examples
 --------
 gitk v2.6.12.. include/scsi drivers/scsi::
 
-       Show as the changes since version 'v2.6.12' that changed any
+       Show the changes since version 'v2.6.12' that changed any
        file in the include/scsi or drivers/scsi subdirectories
 
 gitk --since="2 weeks ago" \-- gitk::