expression or literal. The various $() macros will be expanded in =<expr>=, =<newattr>= or
=<newattrs>= before they are parsed as {quote: ClassAd} expressions or attribute names.
-When a =COPY=,=RENAME= or =DELETE= with =<regex>= is used, regex capture groups are substituted in
+When a =COPY=, =RENAME=, or =DELETE= with =<regex>= is used, regex capture groups are substituted in
=<newattrs>= after $() expansion. \0 will expand to the entire match, \1 to the first capture, etc.
Optionally, a transform rule set can end with an iteration command
