While making patch for #1654990: Coupons pane 'locked' on checkout page coder complained about some (mostly minor) issues.
I intend to provide a patch solving this.
Besides the issues solved with coder I also corrected a small typo (informations).
One of the coder issues was already marked as a @todo namely the underscore needed for global variables.
Committing this and marking #1530528: Drupal coding standards as duplicate.
Automatically closed -- issue fixed for 2 weeks with no activity.
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