allow rustfmt to reorder imports

This wasn't a right decision in the first place, the feature flag was
broken in the last rustfmt release, and syntax highlighting of imports
is more important anyway

crates/ra_syntax/src/parsing/lexer.rs

@@ -6,8 +6,7 @@ mod strings;
 
 use crate::{
     SyntaxKind::{self, *},
-    TextUnit,
-    T,
+    TextUnit, T,
 };
 
 use self::{