Revert "Fix syntax error in jupyter_again.py"

[mwouts]

Reverts #69

[codecov]

Codecov Report

Merging #76 into master will increase coverage by 7.1%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #76     +/-   ##
=======================================
+ Coverage   91.89%    99%   +7.1%     
=======================================
  Files          49     49             
  Lines        2518   2505     -13     
=======================================
+ Hits         2314   2480    +166     
+ Misses        204     25    -179

Impacted Files	Coverage Δ
jupytext/contentsmanager.py	95.36% <0%> (ø)	⬆️
jupytext/magics.py	100% <0%> (ø)	⬆️
jupytext/header.py	99.07% <0%> (+0.92%)	⬆️
jupytext/cell_reader.py	99.48% <0%> (+2.07%)	⬆️
jupytext/cell_to_text.py	100% <0%> (+2.5%)	⬆️
tests/test_cell_metadata.py	100% <0%> (+3.84%)	⬆️
tests/test_unicode.py	100% <0%> (+13.33%)	⬆️
tests/test_rmd_to_ipynb.py	100% <0%> (+23.8%)	⬆️
jupytext/rmarkdownexporter.py	100% <0%> (+40%)	⬆️
tests/test_contentsmanager.py	100% <0%> (+42.97%)	⬆️
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 30690ca...f619fc5. Read the comment docs.