Automatically add hypen between symbol and description

[hanszoons]

Since the closing of #13 hyphens are no longer automatically stripped.
I would like the option to have hyphens automatically added between symbol and description.

The plugin already handles capitalization and dots at the end of lines. For standardization purposes, I would also like to explicitly enforce the use or non-use of hyphens.

[hosseinmd]

We Could do it, I will do it in the future, also PR is welcome.