Timo Kaufmann 236fdbcb62 Revert "python3Packages.notebook: 5.7.8 -> 6.0.3"
This reverts commit 62425ee576fd1f2a21c848d42812721b1c5349dc.

Mistaken update of the pinned python2 version.
2020-05-08 07:22:16 +02:00
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