+ s = re.sub ('(href|src)="(../lily-.*?|.*?[.]png)"', '\\1="../\\2"', s)
+
+ # fix xrefs between documents in different directories ad hoc
+ if 'user/out-www/lilypond' in prefix:
+ s = snippets_ref_re.sub ('href="source/input/lsr/lilypond-snippets', s)
+ elif 'input/lsr' in prefix:
+ s = user_ref_re.sub ('href="source/Documentation/user/lilypond\\1', s)
+