tamer: xir::parse: Correct doc xrefs

These weren't causing problems until they were output as part of NIR (in a
separate module).

NIR is about to be committed.

DEV-7145

tamer/src/xir/parse/attr.rs

@@ -255,7 +255,9 @@ macro_rules! attr_parse {
         #[doc=concat!("[`", stringify!($struct_name), "`].")]
         ///
         /// This object is exposed for recovery and error reporting on
-        ///   [`AttrParseError::MissingRequired`].
+        ///   [`AttrParseError::MissingRequired`][MissingRequired].
+        ///
+        /// [MissingRequired]: crate::xir::parse::AttrParseError::MissingRequired
         #[derive(Debug, PartialEq, Eq)]
         $($vis)? struct $state_name {
             #[doc(hidden)]
@@ -371,6 +373,8 @@ macro_rules! attr_parse {
         impl std::fmt::Display for $state_name {
             /// Additional error context shown in diagnostic messages for
             ///   certain variants of [`ParseError`].
+            ///
+            /// [`ParseError`]: crate::parse::ParseError
             fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
                 use crate::fmt::{DisplayWrapper, TtQuote};
 

tamer/src/xir/parse/ele.rs

@@ -1725,6 +1725,8 @@ macro_rules! ele_parse {
             impl $super {
                 /// Whether the inner (active child) [`ParseState`] is in an
                 ///   accepting state.
+                ///
+                /// [`ParseState`]: crate::parse::ParseState
                 fn is_inner_accepting(
                     &self,
                     ctx: &<Self as crate::parse::ParseState>::Context