Merge branch 'check-environment-regex' into 'master'

Fix environment scope regex

See merge request gitlab-org/gitlab-ee!3641

lib/gitlab/regex.rb

@@ -37,7 +37,7 @@ module Gitlab
     end
 
     def environment_name_regex_chars
-      'a-zA-Z0-9_/\\$\\{\\}\\. -'
+      'a-zA-Z0-9_/\\$\\{\\}\\. \\-'
     end
 
     def environment_name_regex