Fix Old Links to patterns
Occasionally changes to the web pages affect the result of a link you may have saved as bookmark or favorite. To recover the old content you can download an old version and cut-and-paste the page address.
Download an old version
You can download and unzip the source code of a released version or an in between version.
To download an in-between version examine the list of commits,
copy the sha (an alphanumeric identifier) and replace
master with the sha in the link:
Download the last version before the troubled link was created.
Cut-and-paste page address
Locate the unzipped file
index.html (up to the release of 2016-10-2
it lives in the root, for later versions in
docs) and open it in a browser.
From an online address starting with
copy the question mark and the rest at the end of the page address