Add comments with examples and tests

Author: roxelo

clippy_lints/src/escape.rs

@@ -186,7 +186,7 @@ impl<'a, 'tcx> Delegate<'tcx> for EscapeDelegate<'a, 'tcx> {
         }
     }
 
-    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause) { }
+    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause, _: HirId) { }
 }
 
 impl<'a, 'tcx> EscapeDelegate<'a, 'tcx> {

clippy_lints/src/needless_pass_by_value.rs

@@ -335,5 +335,5 @@ impl<'tcx> euv::Delegate<'tcx> for MovedVariablesCtxt {
 
     fn mutate(&mut self, _: &euv::PlaceWithHirId<'tcx>, _: HirId) {}
 
-    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause) { }
+    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause, _: HirId) { }
 }

clippy_utils/src/usage.rs

@@ -79,7 +79,7 @@ impl<'tcx> Delegate<'tcx> for MutVarsDelegate {
         self.update(&cmt)
     }
 
-    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause) { }
+    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause, _:HirId) { }
 }
 
 pub struct ParamBindingIdCollector {