Fix: Combinator rules with mixed base names

[ItsJonQ]

Fix: Combinator rules with mixed base names 🍃

This update allows for the unique hashing to correctly handle combinator-based
rules with different basenames.

For example, this rule:

.First + .Second

Now correctly compiles to:

.First__b123lhjd-1 + .Second

[coveralls]

Pull Request Test Coverage Report for Build 57

• 11 of 11 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 54:	0.0%
Covered Lines:	130
Relevant Lines:	130

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💛 - Coveralls