+@rule((2, 17, 29), r'''Dynamic_engraver -> New_dynamic_engraver+Dynamic_align_engraver
+New_dynamic_engraver -> Dynamic_engraver''')
+def conv(str):
+ str = re.sub ("(\r?\n?[ \t]*\\\\(?:consists|remove)\\s*)(\"?)Dynamic_engraver\\2",
+ r"\1\2New_dynamic_engraver\2\1\2Dynamic_align_engraver\2",
+ str)
+# Should we warn about any remaining Dynamic_engraver? Possibly it
+# will do the job just fine.
+ str = re.sub ("New_dynamic_engraver", "Dynamic_engraver", str)
+ return str
+
+@rule ((2, 19, 0), r'''(make-relative (a b) b ...) -> make-relative (a b) #{ a b #}...''')
+def conv (str):
+ str = re.sub (r"(\(make-relative\s+\(\s*(([A-Za-z][-_A-Za-z0-9]*)" +
+ r"(?:\s+[A-Za-z][-_A-Za-z0-9]*)*)\s*\)\s*)\3(?=\s)",
+ r"\1(make-event-chord (list \2))", str)
+ str = re.sub (r"(\(make-relative\s+\(\s*([A-Za-z][-_A-Za-z0-9]*" +
+ r"(?:\s+([A-Za-z][-_A-Za-z0-9]*))+)\s*\)\s*)\3(?=\s)",
+ r"\1(make-sequential-music (list \2))", str)
+ return str
+
+