Doc: revert bad fix for 617.

Neil said "This is not recommended at all.  The default callback
is a closure, combining the result of
ly:self-alignment-interface:x-aligned-on-self *and*
ly:break-alignable-interface::self-align-callback.  Thus
overriding X-offset also causes 'break-align-symbols to be
ignored, messing up the positioning completely."

I don't understand it, but I understand that he knows more than
me.  :)    I've left the little clean-up that James did.

diff --git a/Documentation/notation/changing-defaults.itely b/Documentation/notation/changing-defaults.itely
index 963b58f71b305f1bbc7e3ffff352ad6024a38ce9..95b394b93d99f8bfa1e47387b43c6dd116d81b6d 100644 (file)
--- a/Documentation/notation/changing-defaults.itely
+++ b/Documentation/notation/changing-defaults.itely
@@ -3421,13 +3421,6 @@ e1
 e1
 @end lilypond
 
-@knownissues
-Overriding the @code{#'X-offset} property to a fixed value causes
-the @code{#'self-alignment-X} property to be disregarded.  Therefore,
-it is recommended to override it with a callback to
-@code{ly:self-alignment-interface::x-aligned-on-self}, similarly to
-its default definition.  This method is described in
-@rextend{Callback functions}
 
 @node Vertical grouping of grobs
 @subsection Vertical grouping of grobs