Unicode errors when creating a new operator-framework charm.

[tlm]

Checklist

• Confirmed this is an issue with charm-tools, not charmstore-client
• Provide versions of tools used
• Described the feature or ways to replicate the issue

What version am I running?

I ran the following command: snap info charm and got the following ouput:

name:      charm
summary:   charm and charm-tools
publisher: Canonical✓
contact:   https://discourse.juju.is/c/charming
license:   unset
description: |
  charmstore-client and charm-tools
commands:
  - charm
snap-id:      2Rryoc2ylScfbFl4eQtpntHD9iuZuMvt
tracking:     stable
refresh-date: today at 01:03 AEST
channels:
  stable:    2.7.7 2020-07-20 (502) 117MB classic
  candidate: 2.7.7 2020-07-20 (502) 117MB classic
  beta:      2.7.7 2020-07-20 (502) 117MB classic
  edge:      2.7.7 2020-07-20 (502) 117MB classic
installed:   2.7.7            (502) 117MB classic

I am using: Arch Linux

Issue/Feature

I expect/expected the following

Successfully creating a new charm dir for operator framework

What I got

/var/lib/snapd/snap/charm/502/bin/wrappers/charm: line 8: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8): No such file or directory
/bin/sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
INFO: Generating charm for test1 in ./test1
INFO: No test1 in apt cache; creating an empty charm instead.
User-friendly name for this charm: test1
Developer contact email: thomas.miller@canonical.com
Developer name: tlm
URL where bugs can be filed for this Charm: github.com
Cloning into '/tmp/tmpmzvy_wcg'...
warning: templates not found /snap/charm/502/share/git-core/templates
remote: Enumerating objects: 104, done.
remote: Counting objects: 100% (104/104), done.
remote: Compressing objects: 100% (57/57), done.
remote: Total 104 (delta 35), reused 98 (delta 30), pack-reused 0
Receiving objects: 100% (104/104), 14.95 KiB | 14.95 MiB/s, done.
Resolving deltas: 100% (35/35), done.
/bin/sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
Traceback (most recent call last):
  File "/snap/charm/502/bin/charm-create", line 33, in <module>
    sys.exit(load_entry_point('charm-tools==2.7.7', 'console_scripts', 'charm-create')())
  File "/snap/charm/502/lib/python3.6/site-packages/charmtools/create.py", line 98, in main
    generator.create_charm()
  File "/snap/charm/502/lib/python3.6/site-packages/charmtools/generators/generator.py", line 82, in create_charm
    self.plugin.create_charm(user_config, tempdir)
  File "/snap/charm/502/lib/python3.6/site-packages/charmtools/templates/operator_python/template.py", line 74, in create_charm
    self._template_file(config, path.join(root, outfile))
  File "/snap/charm/502/lib/python3.6/site-packages/charmtools/templates/operator_python/template.py", line 90, in _template_file
    template = Template(file=outfile, searchList=(config))
  File "/snap/charm/502/lib/python3.6/site-packages/Cheetah/Template.py", line 1281, in __init__
    self._compile(source, file, compilerSettings=compilerSettings)
  File "/snap/charm/502/lib/python3.6/site-packages/Cheetah/Template.py", line 1573, in _compile
    keepRefToGeneratedCode=True)
  File "/snap/charm/502/lib/python3.6/site-packages/Cheetah/Template.py", line 752, in compile
    settings=(compilerSettings or {}))
  File "/snap/charm/502/lib/python3.6/site-packages/Cheetah/Compiler.py", line 1551, in __init__
    source = f.read()
  File "/snap/charm/502/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 79: ordinal not in range(128)