Support text markup at the start of a regular link description.

src/parser/regular_link.rs

@@ -397,11 +397,15 @@ fn description<'b, 'g, 'r, 's>(
     context: RefContext<'b, 'g, 'r, 's>,
     input: OrgSource<'s>,
 ) -> Res<OrgSource<'s>, Vec<Object<'s>>> {
-    let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
-        class: ExitClass::Beta,
-        exit_matcher: &description_end,
-    });
-    let parser_context = context.with_additional_node(&parser_context);
+    let contexts = [
+        ContextElement::ExitMatcherNode(ExitMatcherNode {
+            class: ExitClass::Beta,
+            exit_matcher: &description_end,
+        }),
+        ContextElement::StartTextSection(input),
+    ];
+    let parser_context = context.with_additional_node(&contexts[0]);
+    let parser_context = parser_context.with_additional_node(&contexts[1]);
     let (remaining, (children, _exit_contents)) = verify(
         many_till(
             parser_with_context!(regular_link_description_set_object)(&parser_context),