Added stderr file

Author: pmk21

tests/ui/implicit_saturating_sub.stderr

@@ -0,0 +1,20 @@
+error: Implicitly performing saturating subtraction
+  --> $DIR/implicit_saturating_sub.rs:8:5
+   |
+LL | /     if i > 0 {
+LL | |         i -= 1;
+LL | |     }
+   | |_____^ help: try: `i.saturating_sub(1);`
+   |
+   = note: `-D clippy::implicit-saturating-sub` implied by `-D warnings`
+
+error: Implicitly performing saturating subtraction
+  --> $DIR/implicit_saturating_sub.rs:14:13
+   |
+LL | /             if i > 0 {
+LL | |                 i -= 1;
+LL | |             }
+   | |_____________^ help: try: `i.saturating_sub(1);`
+
+error: aborting due to 2 previous errors
+