Add patch and spec

lib/gitlab/regex.rb

@@ -38,7 +38,7 @@ module Gitlab
     end
 
     def environment_name_regex_chars
-      'a-zA-Z0-9_/\\$\\{\\}\\. -'
+      'a-zA-Z0-9_/\\$\\{\\}\\. \\-'
     end
 
     def environment_name_regex

spec/ee/spec/lib/ee/gitlab/regex_spec.rb

+# coding: utf-8
+require 'spec_helper'
+
+describe Gitlab::Regex do
+  describe '.environment_scope_regex' do
+    subject { described_class.environment_scope_regex }
+
+    it { is_expected.to match('foo') }
+    it { is_expected.to match('foo*Z') }
+    it { is_expected.not_to match('!!()()') }
+  end
+end