A combination between pipe and question mark in regex

$ egrep -ir 'enabled?|disabled?' /etc

Output:

/etc/exim4/exim4.conf.template:# enabled if you use the enable macro MAIN_ALLOW_DOMAIN_LITERALS.
/etc/exim4/exim4.conf.template:  # This is disabled by default so that DNSless systems don't break. If
/etc/exim4/exim4.conf.template:    control = dkim_disable_verify
/etc/exim4/exim4.conf.template:  # to enable this.