The Wikimedia:Wikipedia-ios-image-gallery-fetch-image-info-error-message/en_47385 highlighted comment was created in this revision.
"UNable" → "Unable"
Btw. Wanting to quickly fix this myself I tried to find out where in the source code the typo is, in vain. Is there an easy way to determine this - other than guessing from various circumstances?
That does not lead me to a command downloading the source from git/gerrit. :-( Thus I am still unable to fix it.
If you want to add a patch for the iOS app clone this repo from Gerrit: https://gerrit.wikimedia.org/r/#/admin/projects/apps/ios/wikipedia