e.g. "-- brittany --indent=4"
respects the following comment forms as input:
source comment affected target
======================================================
"-- brittany CONFIG" whole module
"-- brittany-next-binding CONFIG" next binding
"-- brittany-disable-next-binding" next binding
"-- brittany @ myExampleFunc CONFIG" `myExampleFunc`
multiline-comments are supported too, although
the specification must still be a single line. E.g.
"{- brittany --columns 50 -}"
CONFIG is either:
1) one or more flags in the form of what brittany accepts
on the commandline, e.g. "-- columns 50", or
2) one or more specifications in the form of what brittany
accepts in its config files for the layouting config
(a one-line yaml document), e.g. "{ lconfig_cols: 50 }"
see #30