This is a simple script to restore the appearance of section headers in edit summaries prior to phabricator:T165189. This version takes the section name out of the link as well as turning it gray; an alternative version, User:Ekips39/sectionsummaries2.js, leaves the link as is and only recolors it. The "gray" in both scripts is produced by the class autocomment, so if you want a different color, you can set CSS attributes for that class.
To use this script, add the following to your common.js:
{{subst:iusc|User:Ekips39/sectionsummaries.js}}
or for the other version:
{{subst:iusc|User:Ekips39/sectionsummaries2.js}}