error: manual implementation of an assign operation
  --> $DIR/strings.rs:8:9
   |
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/strings.rs:8:13
   |
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/strings.rs:12:13
   |
LL |     let z = y + "...";
   |             ^^^^^^^^^

error: you assigned the result of adding something to this string. Consider using `String::push_str()` instead
  --> $DIR/strings.rs:22:9
   |
LL |         x = x + ".";
   |         ^^^^^^^^^^^
   |
   = note: `-D clippy::string-add-assign` implied by `-D warnings`

error: manual implementation of an assign operation
  --> $DIR/strings.rs:22:9
   |
LL |         x = x + ".";
   |         ^^^^^^^^^^^ help: replace it with: `x += "."`

error: you assigned the result of adding something to this string. Consider using `String::push_str()` instead
  --> $DIR/strings.rs:36:9
   |
LL |         x = x + ".";
   |         ^^^^^^^^^^^

error: manual implementation of an assign operation
  --> $DIR/strings.rs:36:9
   |
LL |         x = x + ".";
   |         ^^^^^^^^^^^ help: replace it with: `x += "."`

error: you added something to a string. Consider using `String::push_str()` instead
  --> $DIR/strings.rs:40:13
   |
LL |     let z = y + "...";
   |             ^^^^^^^^^

error: aborting due to 8 previous errors