fix rubocop failures

lib/bundler/shared_helpers.rb

@@ -204,11 +204,11 @@ def md5_available?
   private
 
     def validate_bundle_path
-      if Bundler.bundle_path.to_s.match(File::PATH_SEPARATOR)
-        puts 'WARNING: Your bundle path contains a ":", which can cause problems.'
-        puts 'Please change your bundle path path to not include ":".'
-        exit(1)
-      end
+      return unless Bundler.bundle_path.to_s.match(File::PATH_SEPARATOR)
+      puts "WARNING: Your bundle path contains a '#{File::PATH_SEPARATOR}', " \
+        "which is the path separator for your system."
+      puts "Please change your bundle path path to not include '#{File::PATH_SEPARATOR}'."
+      exit(1)
     end
 
     def find_gemfile(order_matters = false)

spec/bundler/shared_helpers_spec.rb

@@ -262,13 +262,27 @@
     end
 
     it "exits if bundle path contains the path seperator" do
-      File::PATH_SEPARATOR = ':'
+      stub_const("File::PATH_SEPARATOR", ":".freeze)
       allow(Bundler).to receive(:bundle_path) { "so:me/dir/bin" }
-      expect(subject.send(:validate_bundle_path)).to raise_error(SystemExit)
+      begin
+        expect(subject.send(:validate_bundle_path)).to raise_exception(SystemExit).
+          and output("WARNING: Your bundle path contains a ':', which is the" \
+                     " path separator for your system. Please change your" \
+                     " bundle path path to not include ':'.")
+      rescue SystemExit => e
+        expect(e.status).to eq(1)
+      end
 
-      File::PATH_SEPARATOR = '^'
+      stub_const("File::PATH_SEPARATOR", "^".freeze)
       allow(Bundler).to receive(:bundle_path) { "so^me/dir/bin" }
-      expect(subject.send(:validate_bundle_path)).to raise_error(SystemExit)
+      begin
+        expect(subject.send(:validate_bundle_path)).to raise_exception(SystemExit).
+          and output("WARNING: Your bundle path contains a '^', which is the" \
+                     " path separator for your system. Please change your" \
+                     " bundle path path to not include '^'.")
+      rescue SystemExit => e
+        expect(e.status).to eq(1)
+      end
     end
 
     context "ENV['PATH'] does not exist" do