fix a few clippy warnings

types.rs:
fix single_char_pattern (use character patters instead of string for .ends_with() and .starts_with()

patterns.rs
expr.rs
file_lines.rs:
fix into_iter_on_ref_ptr (use iter() or iter_mut() instead of into_iter()

tests/mod.rs:
check_files(): take Option<PathBuf> by reference

1 files changed, 1 insertions, 1 deletions

diff --git a/src/patterns.rs b/src/patterns.rs
index 675572f4908..7dd315fcb9b 100644
--- a/src/patterns.rs
+++ b/src/patterns.rs
@@ -313,7 +313,7 @@ fn rewrite_tuple_pat(
     context: &RewriteContext,
     shape: Shape,
 ) -> Option<String> {
-    let mut pat_vec: Vec<_> = pats.into_iter().map(|x| TuplePatField::Pat(x)).collect();
+    let mut pat_vec: Vec<_> = pats.iter().map(|x| TuplePatField::Pat(x)).collect();
 
     if let Some(pos) = dotdot_pos {
         let prev = if pos == 0 {