Relocate issues/issue-53348.rs to type/deref-string-assign.rs

Author: reddevilmidzy

tests/ui/issues/issue-53348.rs renamed to tests/ui/type/assign-deref-string-to-string.rs

@@ -1,9 +1,13 @@
+//! Regression test for issue https://github.com/rust-lang/rust/issues/53348
+//! Test that attempting to assign a dereferenced `String` (which is `str`)
+//! to a `String` variable correctly results in a mismatched types error (E0308).
+
 fn main() {
     let mut v = vec!["hello", "this", "is", "a", "test"];
 
     let v2 = Vec::new();
 
-    v.into_iter().map(|s|s.to_owned()).collect::<Vec<_>>();
+    v.into_iter().map(|s| s.to_owned()).collect::<Vec<_>>();
 
     let mut a = String::new(); //~ NOTE expected due to this value
     for i in v {

tests/ui/issues/issue-53348.stderr renamed to tests/ui/type/assign-deref-string-to-string.stderr

@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-53348.rs:10:13
+  --> $DIR/assign-deref-string-to-string.rs:14:13
    |
 LL |     let mut a = String::new();
    |                 ------------- expected due to this value