Fix typo

Author: lnicola

crates/ide_completion/src/completions/lifetime.rs

@@ -1,8 +1,8 @@
 //! Completes lifetimes and labels.
 //!
 //! These completions work a bit differently in that they are only shown when what the user types
-//! has a `'` preceding it, as our fake syntax tree is invalid otherwise(due to us not inserting a
-//! lifetime but an ident for obvious reasons).
+//! has a `'` preceding it, as our fake syntax tree is invalid otherwise (due to us not inserting
+//! a lifetime but an ident for obvious reasons).
 //! Due to this all the tests for lifetimes and labels live in this module for the time being as
 //! there is no value in lifting these out into the outline module test since they will either not
 //! show up for normal completions, or they won't show completions other than lifetimes depending