Steps to reproduce:
In a space, create a new version
In version's description add any word with apostrophe (for example, "version's description")
The description's text is rendered as "version's description"
The description's text is rendered as
Every time user clicks Edit and Save (without changing anything), the description would have additional tags added:
Confluence 5.8.18, 5.9.4, 5.10.0