edition: run 'cargo fix --edition --edition-idioms --all'

crates/matcher/src/interpolate.rs

@@ -92,7 +92,7 @@ impl From<usize> for Ref<'static> {
 /// starting at the beginning of `replacement`.
 ///
 /// If no such valid reference could be found, None is returned.
-fn find_cap_ref(replacement: &[u8]) -> Option<CaptureRef> {
+fn find_cap_ref(replacement: &[u8]) -> Option<CaptureRef<'_>> {
     let mut i = 0;
     if replacement.len() <= 1 || replacement[0] != b'$' {
         return None;

crates/matcher/src/lib.rs

@@ -38,8 +38,6 @@ implementations.
 
 #![deny(missing_docs)]
 
-extern crate memchr;
-
 use std::fmt;
 use std::io;
 use std::ops;
@@ -304,7 +302,7 @@ pub struct ByteSet(BitSet);
 struct BitSet([u64; 4]);
 
 impl fmt::Debug for BitSet {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let mut fmtd = f.debug_set();
         for b in (0..256).map(|b| b as u8) {
             if ByteSet(*self).contains(b) {
@@ -494,7 +492,7 @@ impl ::std::error::Error for NoError {
 }
 
 impl fmt::Display for NoError {
-    fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, _: &mut fmt::Formatter<'_>) -> fmt::Result {
         panic!("BUG for NoError: an impossible error occurred")
     }
 }

crates/matcher/tests/tests.rs

@@ -1,6 +1,3 @@
-extern crate grep_matcher;
-extern crate regex;
-
 mod util;
 
 mod test_matcher;