LL | #[doc(alias = "\t")]
| ^^^^^^^^^^^^
-error: aborting due to 7 previous errors
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+ --> $DIR/check-doc-alias-attr.rs:15:7
+ |
+LL | #[doc(alias = " hello")]
+ | ^^^^^^^^^^^^^^^^
+
+error: `#[doc(alias = "...")]` cannot start or end with ' '
+ --> $DIR/check-doc-alias-attr.rs:16:7
+ |
+LL | #[doc(alias = "hello ")]
+ | ^^^^^^^^^^^^^^^^
+
+error: aborting due to 9 previous errors