Address review comments

Adjust a few fulldeps and pretty-printing tests
Fix rebase

src/test/ui/custom-attribute-multisegment.rs

@@ -0,0 +1,18 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Unresolved multi-segment attributes are not treated as custom.
+
+#![feature(custom_attribute, proc_macro_path_invoc)]
+
+mod existent {}
+
+#[existent::nonexistent] //~ ERROR failed to resolve. Could not find `nonexistent` in `existent`
+fn main() {}