Ian Moody <moz-ian@perix.co.uk> [Mon, 04 Nov 2019 19:05:44 +0000] rev 43403
fsmonitor: use stringutil.forcebytestr() instead of str() on an exception
Similar to 5fa8ac91190e / D7206, should get test-install.t passing on py3.
Differential Revision: https://phab.mercurial-scm.org/D7218
py3: add a __str__ method to Abort
This improves the rendering of some exceptions by avoiding raw
bytestrings, especially when using --traceback option.