Broken suggestion for const_static_lifetime

[killercup]

The suggestion for const_static_lifetime currently only removes 'static from &'static str and leaves a space between & and str.

cf. https://github.com/killercup/rustfix/pull/49

[killercup]

rust-lang/rust#47465 reminded of this (and that I never documented it)

[Manishearth]

#2366