Comments only: annotate FIXMEs in rustdoc

Author: catamorphism

src/rustdoc/doc.rs

@@ -22,7 +22,7 @@ type section = {
 
 // FIXME: We currently give topmod the name of the crate.  There would
 // probably be fewer special cases if the crate had its own name and
-// topmod's name was the empty string.
+// topmod's name was the empty string. (#2596)
 type cratedoc = {
     topmod: moddoc,
 };

src/rustdoc/reexport_pass.rs

@@ -122,7 +122,7 @@ fn build_reexport_def_map(
         def_map: ast_util::new_def_hash()
     };
 
-    // FIXME: Do a parallel fold
+    // FIXME: Do a parallel fold (#2597)
     let fold = fold::fold({
         fold_mod: fold_mod,
         fold_nmod: fold_nmod