Fix clippy issues

Author: gnzlbg

src/bin/cargo_semver.rs

@@ -179,7 +179,9 @@ fn run(config: &cargo::Config, matches: &getopts::Matches, explain: bool) -> Res
              extern crate new;"
         ))?;
     } else {
-        return Err(failure::err_msg("could not pipe to rustc (wtf?)".to_owned()).into());
+        return Err(failure::err_msg(
+            "could not pipe to rustc (wtf?)".to_owned(),
+        ));
     }
 
     let exit_status = child
@@ -438,15 +440,13 @@ pub fn find_on_crates_io(crate_name: &str) -> Result<crates_io::Crate> {
                 "failed to retrieve search results from the registry: {}",
                 e
             ))
-            .into()
         })
         .and_then(|(mut crates, _)| {
             crates
                 .drain(..)
                 .find(|krate| krate.name == crate_name)
                 .ok_or_else(|| {
                     failure::err_msg(format!("failed to find a matching crate `{}`", crate_name))
-                        .into()
                 })
         })
 }

src/changes.rs

@@ -875,7 +875,7 @@ impl<'tcx> ChangeSet<'tcx> {
     pub fn trait_item_breaking(&self, old: DefId) -> bool {
         self.changes
             .get(&old)
-            .map_or(false, |change| change.trait_item_breaking())
+            .map_or(false, Change::trait_item_breaking)
     }
 
     /// Format the contents of a change set for user output.