disallowSpacesInsideParentheses: Extra test to prove there's no bug

Fixes #629
Closes gh-631
Improve validateParameterSeparator rule

Fix parameter separator validation

Closes gh-633
Fix disallowMultipleLineBreaks with shebang line

Previously failing when there was a blank line between the shebang and
the following code.

Fixes #634
Update coverage reporter dependency.
Prepare for version 1.6.2
1.6.2