I think you've misunderstood the use of semantic here - it's semantic for all text files. Instead of describing very exactly 'put 8 spaces here' you're saying '

I think you've misunderstood the use of semantic here - it's semantic for all text files. Instead of describing very exactly 'put 8 spaces here' you're saying 'for some reason this line needs to be indented once, take this information display this as you wish.'