phase-shelve: correct unicode string to honor 'shelve.store=internal'
In the case of strip-based shelves, there should be no hidden commit found.
That's because shelve.store=internal is necessary but not sufficient to enable
phase-based shelves; internal-phase must also be set.
edition = "2018"
max_width = 79
wrap_comments = true
error_on_line_overflow = true