Add regression test for #7758

Author: Manishearth

tests/ui/doc/doc.rs

@@ -203,6 +203,11 @@ fn issue_2343() {}
 /// __|_ _|__||_|
 fn pulldown_cmark_crash() {}
 
+/// This should not lint
+/// (regression test for #7758)
+/// [plain text][path::to::item]
+fn intra_doc_link() {}
+
 // issue #7033 - generic_const_exprs ICE
 struct S<T, const N: usize>
 where [(); N.checked_next_power_of_two().unwrap()]: {

tests/ui/doc/doc.stderr

@@ -186,5 +186,11 @@ error: you should put `mycrate::Collection` between ticks in the documentation
 LL | /// An iterator over mycrate::Collection's values.
    |                      ^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 31 previous errors
+error: you should put `text][path::to::item` between ticks in the documentation
+  --> $DIR/doc.rs:208:12
+   |
+LL | /// [plain text][path::to::item]
+   |            ^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 32 previous errors