rustdoc: Remove nullary-tag dots

src/rustdoc/attr_pass.rs

@@ -167,7 +167,7 @@ fn fold_fn(
                         with *doc
                     }
                 }
-                none. { doc }
+                none { doc }
             }
         }
         // FIXME: Warning when documenting a non-existant arg

src/rustdoc/gen.rs

@@ -162,7 +162,7 @@ fn write_arg(ctxt: ctxt, arg: doc::argdoc) {
       some(desc) {
         ctxt.w.write_str(#fmt(" - %s", desc));
       }
-      none. { }
+      none { }
     }
     ctxt.w.write_line("");
 }

src/rustdoc/tystr_pass.rs

@@ -50,7 +50,7 @@ fn merge_ret_ty(
       some(doc) {
         fail "unimplemented";
       }
-      none. {
+      none {
         alt get_ret_ty(srv, fn_id) {
           some(ty) {
             some({
@@ -58,7 +58,7 @@ fn merge_ret_ty(
                 ty: some(ty)
             })
           }
-          none. { none }
+          none { none }
         }
       }
     }