Documentation request: OAuth access doesn't expire

Summary

According to the documentation, every token expires after 7 days. However older tokens are still valid on JIRA Software 7.2.7 server. Looking at the screen, from the user profile we don't seem that we indicate any expiration data and old tokens are still valid.
We need to clarify if/when does OAuth token expire. Then the documentation needs to be adjusted accordingly.

Steps to Reproduce

1. Go to https://jira.atlassian.com/secure/ViewProfile.jspa
2. Then to Tools > View OAuth Access Tokens
   • Or directly to https://jira.atlassian.com/plugins/servlet/oauth/users/access-tokens

Expected Results

According to the documentation every token expires after 7 days.

Actual Results

From the user profile we don't seem that we indicate any expiration data and old tokens are still valid.
The documentation needs to be adjusted.