shelve: consistently convert exception to bytes via `stringutil.forcebytestr`
The other two places in this module use this, and past experience shows that
this method does a nicer job. I'm not sure why we're converting to bytes here-
`KeyError` is built-in and will have str attrs, and `RepoLookupError` is a
subclass of the built-in `Exception` class (not `errors.Error`, which is
allegedly the baseclass for all Mercurial exceptions).
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
end_of_line = lf
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
end_of_line = lf
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false
end_of_line = lf