add anonymous lifetimes, remove unnecessary extern crate declaration

Author: chrissimpkins

src/git.rs

@@ -26,7 +26,7 @@ pub struct Commit {
 
 impl Commit {
     // Takes &mut because libgit2 internally caches summaries
-    fn from_git2_commit(commit: &mut Git2Commit) -> Self {
+    fn from_git2_commit(commit: &mut Git2Commit<'_>) -> Self {
         Commit {
             sha: commit.id().to_string(),
             date: Utc.timestamp(commit.time().seconds(), 0),
@@ -83,7 +83,7 @@ pub fn get_commits_between(first_commit: &str, last_commit: &str) -> Result<Vec<
 
     // Sanity check -- our algorithm below only works reliably if the
     // two commits are merge commits made by bors
-    let assert_by_bors = |c: &Git2Commit| -> Result<(), Error> {
+    let assert_by_bors = |c: &Git2Commit<'_>| -> Result<(), Error> {
         match c.author().name() {
             Some("bors") => Ok(()),
             Some(author) => bail!("Expected author {} to be bors for {}", author, c.id()),

src/least_satisfying.rs

@@ -174,7 +174,7 @@ pub enum Satisfies {
 }
 
 impl fmt::Display for Satisfies {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{:?}", self)
     }
 }

src/main.rs

@@ -9,8 +9,7 @@
 extern crate failure;
 #[macro_use]
 extern crate log;
-#[cfg(test)]
-extern crate quickcheck;
+
 
 use std::env;
 use std::ffi::OsString;
@@ -219,7 +218,7 @@ impl Opts {
 struct ExitError(i32);
 
 impl fmt::Display for ExitError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "exiting with {}", self.0)
     }
 }
@@ -238,7 +237,7 @@ enum ToolchainSpec {
 }
 
 impl fmt::Display for ToolchainSpec {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             ToolchainSpec::Ci { ref commit, alt } => {
                 let alt_s = if alt { format!("-alt") } else { String::new() };
@@ -266,7 +265,7 @@ impl Toolchain {
 }
 
 impl fmt::Display for Toolchain {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self.spec {
             ToolchainSpec::Ci { ref commit, alt } => {
                 let alt_s = if alt { format!("-alt") } else { String::new() };