New tests for UndoManager.js that are particular to past issues we want to confirm don't pop up again.
Avoid returning an undefined value from editor.execCommand when a command reaches the browser.
Merge branch 'danielpunkass' into redsweater
Fix script tag for redsweater tests so it doesn't obfuscate the DOMUtils tests that follow.
Merge branch 'redsweater' into danielpunkass
Restore support for handling non-numeric value arguments to setStyle that should have "px" added by default. Also added tests to cover the cases where a raw number or a numeric string is passed for fontSize without a px suffix.
Merge branch 'implicit-pixels' into danielpunkass