Merge pull request #2731 from JCount/pull-spec-use-non-fork-pr

pull_spec: use stable, non-fork PR for patch expectation

Library/Homebrew/test/dev-cmd/pull_spec.rb

@@ -34,7 +34,7 @@ describe "brew pull", :integration_test do
       .and output(/Can only bump one changed formula/).to_stderr
       .and be_a_failure
 
-    expect { brew "pull", "https://github.com/Homebrew/homebrew-core/pull/1" }
+    expect { brew "pull", "https://github.com/Homebrew/brew/pull/1249" }
       .to output(/Fetching patch/).to_stdout
       .and output(/Patch failed to apply/).to_stderr
       .and be_a_failure