Fix warnings emitted when compiling as part of rustc

Author: luca-barbieri

crates/ra_parser/src/lib.rs

@@ -12,6 +12,8 @@
 //!
 //! Tests for this crate live in `ra_syntax` crate.
 
+#![allow(elided_lifetimes_in_paths)]
+
 #[macro_use]
 mod token_set;
 #[macro_use]

crates/ra_syntax/src/algo.rs

@@ -316,7 +316,7 @@ impl<'a> SyntaxRewriter<'a> {
     }
 }
 
-impl<'a> ops::AddAssign for SyntaxRewriter<'_> {
+impl ops::AddAssign for SyntaxRewriter<'_> {
     fn add_assign(&mut self, rhs: SyntaxRewriter) {
         assert!(rhs.f.is_none());
         self.replacements.extend(rhs.replacements)

crates/ra_syntax/src/lib.rs

@@ -19,6 +19,8 @@
 //! [RFC]: <https://github.com/rust-lang/rfcs/pull/2256>
 //! [Swift]: <https://github.com/apple/swift/blob/13d593df6f359d0cb2fc81cfaac273297c539455/lib/Syntax/README.md>
 
+#![allow(elided_lifetimes_in_paths)]
+
 mod syntax_node;
 mod syntax_error;
 mod parsing;