tests: partially fix test-transaction-rollback-on-revlog-split.t on Windows
For whatever reason, the extra space causes different output on Windows:
$ printf '% 20d' '1' | xxd -
0000000: 2020 2020 2020 2020 2020 2020 2020 2020
0000010: 2020 2020 31 1
vs WSL:
/mnt/c/Users/Matt/hg/tests$ printf '% 20d' '1' | xxd -
00000000: 2020 2020 2020 2020 2020 2020 2020 2020
00000010: 2020 2031
Without the space, they both agree the last word is 2031. There are other
failures on Windows that I don't understand that are introduced by
46b828b85eb7
and
18415fc918a1.
Differential Revision: https://phab.mercurial-scm.org/D10763
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