Allow the user to specify the fallback encoding for the changelog
Example: use EUC-JP instead of ISO-8859-1:
[ui]
fallbackencoding = EUC-JP
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0 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding b
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding b