I have noticed that if you have a single or double quote in a property name or default value in EPiServer 7.5, the text past and including the first quote is cut off.
e.g. I add a description to a property that says
The heading text at the top of the page, e.g. 'Welcome'
It would display the following when hovering over (viewing description)
The heading text at the top of the page, e.g.
Because it cuts after the first ' or \".
This may apply to other things such as property names, I haven't tested extensively to see what is affected.
You can solve this by escaping the quote with a backslash
Description = "The heading text at the top of the page, e.g. \"Welcome\""
You can also use HTML inside the names and descriptions.