py3: convert context to bytes instead of str This yields identical behavior on Python 2 and 3. Differential Revision: https://phab.mercurial-scm.org/D2174

py3: add missing b'' literal to sshprotoext.py Everywhere else in this file uses b''. I must have missed a line when I wrote this code a few days ago. # skip-blame b prefix Differential Revision: https://phab.mercurial-scm.org/D2173

py3: make dummyssh compatible with Python 3 Required encoding a str to bytes and writing bytes to a file descriptor. Differential Revision: https://phab.mercurial-scm.org/D2170

mail: import email.utils not email.Utils email.Utils was renamed to email.utils in Python 2.5. But it appears at some point before Python 2.7 (possibly 2.5) email.Utils was aliased to the new home. So email.utils should be safe for all versions of Python we support. Differential Revision: https://phab.mercurial-scm.org/D2168

py3: cast character set to bytes The returned value from this function is eventually fed into email.charset.Charset.__init__. However, the standard library appears to handle both string types in Python 2 and 3. So there shouldn't be any problem returning a bytes here. Differential Revision: https://phab.mercurial-scm.org/D2167

py3: cast decode() argument to system string The actual types here may be mixed due to string literals and variables from other modules. So a cast is necessary. Differential Revision: https://phab.mercurial-scm.org/D2166