git/usr/share/nano/groff.nanorc

## Syntax highlighting for groff.

## Original author:  Robert D. Goulding

syntax groff "\.(me|mm|mom|ms|roff|tmac)$|/tmac\.[^/]+$"
comment ".\""

# The setting of a string or register
color cyan "^\.(ds|nr) [^[:space:]]*"
# Single-character escapes
color brightmagenta "\\."
# The argument of \f or \s in the same color
color brightmagenta "\\f(.|\(..)|\\s(\+|\-)?[0-9]"
# References to registers
color cyan "\\(\\)?n(.|\(..)"
color cyan start="\\(\\)?n\[" end="]"
# Requests
color brightgreen "^\.[[:blank:]]*[^[:space:]]*"
# Comments
color yellow "(^\\#|(^\.)?\\").*"
# References to strings
color green "\\(\\)?\*(.|\(..)"
color green start="\\(\\)?\*\[" end="]"
# Special characters
color brightred "\\\(.."
color brightred start="\\\[" end="]"
# Macro arguments
color brightcyan "\\\\\$[0-9]"