add clean_whitespace option to fuzzy retrieval function

[ryboselm]

do not merge yet, i made this as a starting point for issue 878 (#878), still figuring out what else needs to be modified outside of this one function

[codecov]

Codecov Report

Merging #900 (2bc57b5) into master (6e06bde) will decrease coverage by 0.05%.
The diff coverage is 64.70%.

@@            Coverage Diff             @@
##           master     #900      +/-   ##
==========================================
- Coverage   71.66%   71.61%   -0.06%     
==========================================
  Files          75       75              
  Lines        8187     8197      +10     
==========================================
+ Hits         5867     5870       +3     
- Misses       2320     2327       +7     

Impacted Files	Coverage Δ
regolith/tools.py	82.74% <64.70%> (-0.58%)	⬇️

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[sbillinge]

before coding the solution, code some tests. You will find the tests for fuzzy_retrieval in tests/test_tools.py. Then code the solution until the tests pass. Add a test for each possible combination.

[ryboselm]

I don't think the change I made in this commit actually solves anything related to issue #878. closing the PR because of that. will make a new one that actually fixes it.