doc/filters: review introductory example and explanation
authorStefano Sabatini <stefasab@gmail.com>
Fri, 5 Apr 2013 23:43:01 +0000 (01:43 +0200)
committerStefano Sabatini <stefasab@gmail.com>
Wed, 10 Apr 2013 16:02:00 +0000 (18:02 +0200)
commit215ca864759a54f45265a51ac57dbfd75cb23da2
tree6bfc44c2aed77c8e443769c5d7db5001cfaceaea
parente62fca11a84da8c2efef73f17e4a3127567011db
doc/filters: review introductory example and explanation

In particular, fix wrong vertical mirroring command, and clarify
and extend explanation.

Based on a patch by littlebat <dashing.meng@gmail.com>.

Should fix trac ticket #2413.
doc/filters.texi