can nbdiff ignore indentation and whitespaces?

[gnahz04]

From https://nbdime.readthedocs.io/en/latest/config.html it seems that there are no options to achieve the equivalent of these diff options, after the notebook code is auto-indented in an IDE:

       -E, --ignore-tab-expansion
              ignore changes due to tab expansion

       -Z, --ignore-trailing-space
              ignore white space at line end

       -b, --ignore-space-change
              ignore changes in the amount of white space

       -w, --ignore-all-space
              ignore all white space

       -B, --ignore-blank-lines
              ignore changes where lines are all blank


       -d, --minimal
              try hard to find a smaller set of changes

Could these be added?

[afeld]

Seems like passing autojunk=True might do the trick…?

nbdime/nbdime/diffing/generic.py

Line 58 in 606b6fd

s = difflib.SequenceMatcher(None, x, y, autojunk=False)

See also: https://stackoverflow.com/questions/63893283/difflib-ignore-whitespace-diffs-w-ndiff

[zmbc]

I don't think autojunk is quite what we want, as it auto-detects what is "junk" rather than whitespace only.

There is now an option to ignore all-whitespace lines, equivalent to -B:

nbdime/nbdime/diffing/generic.py

Line 27 in bd880c6

def set_text_similarity_options(threshold: Optional[Union[int, float]]=None, ignore_whitespace_lines: Optional[bool]=None) -> None:

Would one of you be willing to open a PR to add the other flags?