causing no injury po angielsku:

an innocuous remark

This is not an innocuous subject, however.

Some mushrooms look innocuous but are in fact poisonous.

He posted some completely innocuous posts but some people went mental over the possible danger of them.

Thus, some advice to wiki wannabes: if you feel weird about modifying a wiki page, try just rewording a sentence, fixing some punctuation, or doing something similarly innocuous.