Fixing three subtle bugs with numerics in problem files.

[haz]

Fixes

Does two important things to address #99 and another bug found:

1. NUMBER was matching on anything with a space (so 5 3 was a single number)
2. The f-expressions in the problem file were pointing back to the domain definition, and thus trying to wrap in Variables.
3. (update) Added another fix for #101, which now allows equality in metric goal conditions.

Types of changes

What types of changes does your code introduce? Put an x in the boxes that apply

• [x] Bugfix (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 not work as expected)

Checklist

Put an x in the boxes that apply.

• [x] I have read the CONTRIBUTING doc
• [x] Lint and unit tests pass locally with my changes
• [x] I have added tests that prove my fix is effective or that my feature works

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (514d568) 88.10% compared to head (260fe74) 88.33%.

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Additional details and impacted files

[](https://app.codecov.io/gh/AI-Planning/pddl/pull/103?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AI-Planning) ```diff @@ Coverage Diff @@ ## main #103 +/- ## ========================================== + Coverage 88.10% 88.33% +0.22% ========================================== Files 25 25 Lines 1791 1791 Branches 332 332 ========================================== + Hits 1578 1582 +4 + Misses 154 149 -5 - Partials 59 60 +1 ``` | [Flag](https://app.codecov.io/gh/AI-Planning/pddl/pull/103/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AI-Planning) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/AI-Planning/pddl/pull/103/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AI-Planning) | `88.33% <ø> (+0.22%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AI-Planning#carryforward-flags-in-the-pull-request-comment) to find out more. [see 1 file with indirect coverage changes](https://app.codecov.io/gh/AI-Planning/pddl/pull/103/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AI-Planning)