TinyMCE help: Break up strings changed in [28027] for ease of changing later.

Restores a not inaccurate paragraph to reduce churn.

see #27100.

Built from https://develop.svn.wordpress.org/trunk@28028


git-svn-id: http://core.svn.wordpress.org/trunk@27858 1a063a9b-81f0-0310-95a4-ce76da25c4cd