Add: Generate a String With Characters That Have Odd Counts

[awesee]

No description provided.

[codecov]

Codecov Report

Merging #772 into master will not change coverage by %.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #772   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          236       237    +1     
  Lines         2379      2386    +7     
=========================================
+ Hits          2379      2386    +7     

Impacted Files	Coverage Δ
...e_a_string_with_characters_that_have_odd_counts.go	100.00% <100.00%> (ø)

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