Remove trailing space from numericStepper when suffix doesn't exist

[gris]

What is the purpose of this pull request?

NumericStepper has a weird behavior when there isn't a suffix. This contribution tries to fix it.

I've parsed the suffix variable to check and see if there is any. In which case it puts whitespace between the number and the suffix, otherwise, it adds no space.

What problem is this solving?

You can check the behavior here https://www.als.com/edelws-cord-bulk-per-foot/p

Shoppers that want to put a high quantity in their carts are having trouble.

How should this be manually tested?

Just run yarn styleguide

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

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