error: manual implementation of an assign operation --> $DIR/string_add.rs:13:9 | LL | x = x + "."; | ^^^^^^^^^^^ help: replace it with: `x += "."` | = note: `-D clippy::assign-op-pattern` implied by `-D warnings` error: you added something to a string. Consider using `String::push_str()` instead --> $DIR/string_add.rs:13:13 | LL | x = x + "."; | ^^^^^^^ | = note: `-D clippy::string-add` implied by `-D warnings` error: you added something to a string. Consider using `String::push_str()` instead --> $DIR/string_add.rs:17:13 | LL | let z = y + "..."; | ^^^^^^^^^ error: manual implementation of an assign operation --> $DIR/string_add.rs:22:5 | LL | x = x + 1; | ^^^^^^^^^ help: replace it with: `x += 1` error: aborting due to 4 previous errors