py3: add b'' to make a triple quoted string bytes on Python 3
Transformer does not adds b'' in front of triple quoted strings to prevent
converting docs to bytes.
requesting all changes
adding changesets
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added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved