Auto merge of #10499 - blyxyas:fix-almost_swapped, r=giraffate

Fix `almost_swapped` false positive (`let mut a = b; a = a`)

Fixes `2` in #10421
changelog: [`almost_swapped`]: Fix false positive when a variable is changed to itself. (`a = a`)

tests/ui/swap.fixed

@@ -186,3 +186,11 @@ const fn issue_9864(mut u: u32) -> u32 {
     v = temp;
     u + v
 }
+
+#[allow(clippy::let_and_return)]
+const fn issue_10421(x: u32) -> u32 {
+    let a = x;
+    let a = a;
+    let a = a;
+    a
+}

tests/ui/swap.rs

@@ -215,3 +215,11 @@ const fn issue_9864(mut u: u32) -> u32 {
     v = temp;
     u + v
 }
+
+#[allow(clippy::let_and_return)]
+const fn issue_10421(x: u32) -> u32 {
+    let a = x;
+    let a = a;
+    let a = a;
+    a
+}