Improve filter help text.

- Mention that "efficient way" means zero-copy,

- Replace "filter options" by "options for a particular filter",

- Replace -f by --filter.

diff --git a/ggo/filter.m4 b/ggo/filter.m4
index 4e991764f3c764339eddb0aa4e9fa68c732bcaf3..9df0f3f2c9c7abde867f9438f76f36b002e13e7b 100644 (file)
--- a/ggo/filter.m4
+++ b/ggo/filter.m4
@@ -9,13 +9,13 @@ optional
 multiple
 details="
        May be given multiple times to 'pipe' the stream through
-       arbitrary many filters in an efficient way.  The same filter
-       may appear more than once, order matters.
+       arbitrary many filters (without copying the data). The same
+       filter may appear more than once, order matters.
 
-       Filter options may be specified for each '-f' option
-       separately. Note that you will have to quote these options
-       like this:
+       Options for a particular filter may be specified for each
+       given '--filter' option separately. You will have to quote
+       these options like this:
 
-               -f 'compress --inertia 5 --damp 2'
+               --filter 'compress --inertia 5 --damp 2'
 "
 </qu>