diff rust/hg-core/src/utils.rs @ 44973:26114bd6ec60

rust: do a clippy pass

This is the result of running `cargo clippy` on hg-core/hg-cpython and fixing
the lints that do not require too much code churn (and would warrant a separate
commit/complete refactor) and only come from our code (a lot of warnings in
hg-cpython come from `rust-cpython`).

Most of those were good lints, two of them was the linter not being smart
enough (or compiler to get up to `clippy`'s level depending on how you see it).

Maybe in the future we could have `clippy` be part of the CI.

Differential Revision: https://phab.mercurial-scm.org/D8635

--- a/rust/hg-core/src/utils.rs	Mon Jun 15 15:14:16 2020 -0400
+++ b/rust/hg-core/src/utils.rs	Mon Jun 15 18:26:40 2020 +0200
@@ -68,6 +68,7 @@
     fn drop_prefix(&self, needle: &Self) -> Option<&Self>;
 }
 
+#[allow(clippy::trivially_copy_pass_by_ref)]
 fn is_not_whitespace(c: &u8) -> bool {
     !(*c as char).is_whitespace()
 }
@@ -75,7 +76,7 @@
 impl SliceExt for [u8] {
     fn trim_end(&self) -> &[u8] {
         if let Some(last) = self.iter().rposition(is_not_whitespace) {
-            &self[..last + 1]
+            &self[..=last]
         } else {
             &[]
         }
@@ -151,7 +152,7 @@
 
 impl<'a, T: Escaped> Escaped for &'a [T] {
     fn escaped_bytes(&self) -> Vec<u8> {
-        self.iter().flat_map(|item| item.escaped_bytes()).collect()
+        self.iter().flat_map(Escaped::escaped_bytes).collect()
     }
 }