Also, allow an @} and another @command{} within a pair of braces,
colorize only the valid @-commands with uppercase in their names,
unbold enclosed command arguments, colorize the directory entries
for the manual, and properly colorize also the comments that use
the full @comment command.
Reference:
https://www.gnu.org/software/texinfo/manual/texinfo/html_node/Command-List.html
Testing was done with:
info texinfo @-C "Command List" --output=list
sed -i -e "s/^'//" -e "s/'$//" list
nano list -Ytexinfo
badf3edc55