examples are distinct snippets; files that are also included in the
regression tests should be copied from input/regression/ into this
direction and listed here.
+- anything from LSR should be in Documentation/snippets/, though
+- simple.ly isn't large, but it's included from
+ scm/define-markup-commands.scm and should not be removed.
+
+Do not use @ref{} in files in Documentation/included/;
+cross-references should be made with specific macros such as
+@rcontrib{}, @rextend{}, etc. See Documentation/macros.itexi for a
+complete list.