Move /src/test to /tests

tests/rustdoc-ui/track-diagnostics.rs

@@ -0,0 +1,10 @@
+// compile-flags: -Z track-diagnostics
+// error-pattern: created at
+
+// Normalize the emitted location so this doesn't need
+// updating everytime someone adds or removes a line.
+// normalize-stderr-test ".rs:\d+:\d+" -> ".rs:LL:CC"
+
+struct A;
+struct B;
+const S: A = B;