Improve message for glossary error

When a glossary entry has some error, mention the entry to the user. This will make easy for user fix it.
Does this line of code actually work? It should have raised `ValueError: cannot switch from manual field specification to automatic field numbering`. For consistency, all error messages should use numbered references.

Also, instead of escaping the quotation marks, other error messages simply use single quotes. This line of code should read:

`"Glossary entry '{1}' must have at least two lines- "`