Only time I've seen that happen was with ColdFusion or Java-powered sites that don't strip the lines used by inline logic, eg where you see 10 empty lines, ther

Only time I've seen that happen was with ColdFusion or Java-powered sites that don't strip the lines used by inline logic, eg where you see 10 empty lines, there might be an if/else snippet running. At runtime, the language runs through those parts, but keeps the space intact.