Fix formatting in formula

As reported:
http://lists.w3.org/Archives/Public/public-fx/2014OctDec/0125.html

Generated from:

commit 545af4361215de519460f46c7a46fa94ed2da9f6
Author: Brian Birtles <birtles@gmail.com>
Date:   Wed Dec 24 15:12:38 2014 +0900

    Fix formatting in formula

    As reported:
    http://lists.w3.org/Archives/Public/public-fx/2014OctDec/0125.html

commit df7bba1ecd2ec5646804f25d02dd0d0be7f58f88
Author: Brian Birtles <birtles@gmail.com>
Date:   Wed Dec 24 15:11:00 2014 +0900

    Replace "animatable" and "not animatable" with "concept ... "

commit 8f592d3a14f6dc4c3cc9fc0f8a2fa9960aee2303
Author: Brian Birtles <birtles@gmail.com>
Date:   Wed Dec 24 15:06:46 2014 +0900

    Fix references to KeyframeEffect

commit 902bb256fc5c2a5a7aba14db281924866c0be262
Author: Brian Birtles <birtles@gmail.com>
Date:   Wed Dec 24 09:19:20 2014 +0900

    Replace "animation" definition with "concept animation"