Remove the Show field title checkbox from the global field settings. Control label display using the Revision comparison view mode settings.
A checked global setting would correspond to "Above" label display, unchecked would correspond to "Hidden" label display.
"Inline" labels could be appended to the field value?
Closed: outdated
3.0
Code
Given the proximity of EOL for Drupal 7, marking this as won't fix. The likely final Drupal 7 release of diff has landed in https://www.drupal.org/project/diff/releases/7.x-3.5 → . If this is something still applicable to a more modern version of the module, feel free to re-open and post additional notes.