[%- text = "The cat sat on the mat" %] [%- text FILTER replace(' ', '_') %] [% text FILTER replace('sat', 'shat') +%] [% text | replace('at', 'plat') +%] [% text = 'The <=> operator, blah, blah' %] [%- text | html | replace('blah', 'rhubarb') %]