Ignore it and describe nodes with evaluated expressions

[jinbijin]

Description

Corrects rule state in branch mode if a call to describe or it is encountered with an evaluated expression as first argument. Fixes #164 .

How has this been tested?

Added mocha tests to no-suite-dupes and no-spec-dupes, and confirmed that they failed before the change in the no-dupes helper.

Types of changes

• Test change (non-breaking change which adds additional test scenarios)
• Refactor change (non-breaking change updates coding styles)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have ran npm run test and everything passes
• My code follows the code style of this project
• I have updated the documentation where necessary
• I have read the CONTRIBUTING document
• I have added tests to cover my changes
• All new and existing tests pass