some clippy::performance fixes

use vec![] instead of Vec::new() +  push()
avoid redundant clones
use chars instead of &str for single char patterns in ends_with() and starts_with()
allocate some Vecs with capacity to avoid unneccessary resizing

1 files changed, 2 insertions, 2 deletions

diff --git a/crates/ide/src/join_lines.rs b/crates/ide/src/join_lines.rs
index 20a920ddb..d571ed559 100644
--- a/crates/ide/src/join_lines.rs
+++ b/crates/ide/src/join_lines.rs
@@ -218,7 +218,7 @@ mod tests {
         let result = join_lines(&file, range);
 
         let actual = {
-            let mut actual = before.to_string();
+            let mut actual = before;
             result.apply(&mut actual);
             actual
         };
@@ -622,7 +622,7 @@ fn foo() {
         let parse = SourceFile::parse(&before);
         let result = join_lines(&parse.tree(), sel);
         let actual = {
-            let mut actual = before.to_string();
+            let mut actual = before;
             result.apply(&mut actual);
             actual
         };