Argument --test fails if run on different jupytext versions

[kernc]

jupytext --test --to ipynb FILE.py fails with:

[jupytext] Reading FILE.py
--- expected
+++ actual
@@ -5,7 +5,7 @@
 #       extension: .py
 #       format_name: light
 #       format_version: '1.5'
-#       jupytext_version: 1.3.0
+#       jupytext_version: 1.3.2
 #   kernelspec:
 #     display_name: Python 3
 #     language: python

I suggest to add jupytext_version (and maybe even format_version) to _IGNORE_CELL_METADATA (or appropriate), because those lines will differ on different jupytext invocations but might otherwise not influence the converted output in any way.

They remain covered by --test-strict.

[mwouts]

Hello @kernc , yes I agree, this is among the expected changes in a round-trip. I will fix this in the next release.