update hooks documentation to use mark_safe as no variables are used
update hooks documentation to use mark_safe as no variables are used

zerolab/wagtail,wagtail/wagtail,mixxorz/wagtail,jnns/wagtail,torchbox/wagtail,thenewguy/wagtail,torchbox/wagtail,thenewguy/wagtail,thenewguy/wagtail,thenewguy/wagtail,torchbox/wagtail,zerolab/wagtail,mixxorz/wagtail,rsalmaso/wagtail,mixxorz/wagtail,rsalmaso/wagtail,jnns/wagtail,torchbox/wagtail,zerolab/wagtail,jnns/wagtail,mixxorz/wagtail,wagtail/wagtail,thenewguy/wagtail,wagtail/wagtail,jnns/wagtail,zerolab/wagtail,rsalmaso/wagtail,mixxorz/wagtail,wagtail/wagtail,wagtail/wagtail,rsalmaso/wagtail,zerolab/wagtail,rsalmaso/wagtail