Update ui tests

tests/ui/stutter.rs

@@ -9,6 +9,10 @@ mod foo {
     pub fn bar_foo() {}
     pub struct FooCake {}
     pub enum CakeFoo {}
+    pub struct Foo7Bar;
+
+    // Should not warn
+    pub struct Foobar;
 }
 
 fn main() {}

tests/ui/stutter.stderr

@@ -24,3 +24,9 @@ error: item name ends with its containing module's name
 11 |     pub enum CakeFoo {}
    |     ^^^^^^^^^^^^^^^^^^^
 
+error: item name starts with its containing module's name
+  --> $DIR/stutter.rs:12:5
+   |
+12 |     pub struct Foo7Bar;
+   |     ^^^^^^^^^^^^^^^^^^^
+