4.1.1.2 Boolean options

To enable a boolean option simply specify the option without any corresponding value, or prefix it with an ‘enable-’. For example to create a backup file use ‘--backup’. To disable a boolean option prefix the option name with a ‘dont-’ or ‘disable-’. To avoid creating a backup file use ‘--dont-backup’. Boolean options can also be set directly like a value option where the value is either "true" or "false", for example ‘--backup=true’.

If a boolean option has a single letter abbreviation simply give the letter corresponding to either enabling or disabling the option without any corresponding value. For example, to consider run-together words valid use ‘-C’ or to consider them invalid use ‘-B’