doc: pretty-formats document negative column alignments

Commit 066790d7cb0 (pretty.c: support <direction>|(<negative number>) forms,
2016-06-16) added the option for right justified column alignment without
updating the documentation.

Add an explanation of its use of negative column values.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 8cc1072196ef04678548a41f0816ac5354f66afe..cbca60a19621864b38a16a67efd9483daa404c7f 100644 (file)
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -158,7 +158,9 @@ The placeholders are:
                                  Note 2: spaces around the N and M (see below)
                                  values are optional.
 '%<|( <M> )':: make the next placeholder take at least until Mth
-            display column, padding spaces on the right if necessary
+            display column, padding spaces on the right if necessary.
+            Use negative M values for column positions measured
+            from the right hand edge of the terminal window.
 '%>( <N> )', '%>|( <M> )':: similar to '%<( <N> )', '%<|( <M> )' respectively,
                        but padding spaces on the left
 '%>>( <N> )', '%>>|( <M> )':: similar to '%>( <N> )', '%>|( <M> )'