Ad-hoc fix of test-bundler

spec/bundler/bundler/cli_spec.rb

@@ -2,6 +2,16 @@
 
 require "bundler/cli"
 
+using Module.new {
+  # Some `man` (e.g., on macOS) always highlights the output even to
+  # non-tty.
+  refine Spec::Helpers do
+    def out
+      super.gsub(/.[\b]/, '')
+    end
+  end
+}
+
 RSpec.describe "bundle executable" do
   it "returns non-zero exit status when passed unrecognized options" do
     bundle "--invalid_argument", :raise_on_error => false