smerge-refine-chopup-region

smerge-refine-chopup-region is a compiled Lisp function in `smerge-mode.el'.

(smerge-refine-chopup-region BEG END FILE &optional PREPROC)

Chopup the region into small elements, one per line.
Save the result into FILE.
If non-nil, PREPROC is called with no argument in a buffer that contains
a copy of the text, just before chopping it up. It can be used to replace
chars to try and eliminate some spurious differences.