\u2018 not encodeable

[shinglyu]

% python moztrap.py clone caseversion 112157 ✹ ✭
INFO:root:Downloading CaseVersion 112157 ...
Traceback (most recent call last):
File "moztrap.py", line 50, in
main()
File "moztrap.py", line 38, in main
mtapi.clone(args.resource_type, args.id)
File "/home/slyu/workspace/moztrap-cli/mtapi.py", line 57, in clone
output = orm.formatCaseversion(result)
File "/home/slyu/workspace/moztrap-cli/orm.py", line 24, in formatCaseversion
expected=step['expected'])
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2018' in position 111: ordinal not in range(128)