Add suggestion for duplicated import.

This commit adds a suggestion when a import is duplicated (ie. the same name
is used twice trying to import the same thing) to remove the second
import.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/test/ui/issues/auxiliary/issue-52891.rs b/src/test/ui/issues/auxiliary/issue-52891.rs
new file mode 100644
index 00000000000..07598118322
--- /dev/null
+++ b/src/test/ui/issues/auxiliary/issue-52891.rs
@@ -0,0 +1,33 @@
+pub mod a {
+    pub mod inner {
+    }
+}
+
+pub mod b {
+    pub mod inner {
+    }
+}
+
+pub mod c {}
+
+pub mod d {}
+
+pub mod e {}
+
+pub mod f {}
+
+pub mod g {}
+
+pub mod h {}
+
+pub mod i {}
+
+pub mod j {}
+
+pub mod k {}
+
+pub mod l {}
+
+pub mod m {}
+
+pub mod n {}