Fix friendly numbers

[W0uldYouKindly]

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Describe your change:

• Add an algorithm?
• [☑] Fix a bug or typo in an existing algorithm? (Commit message contains description of changes)
• Documentation change?

Checklist:

• [ ☑] I have read CONTRIBUTING.md.
• [ ☑] This pull request is all my own work -- I have not plagiarized.
• [ ☑] I know that pull requests will not be merged if they fail the automated tests.
• [☑ ] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [ ☑] All new JavaScript files are placed inside an existing directory.
• [☑ ] All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
  Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• [ ☑] All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
• [ ☑] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.91%. Comparing base (08d8c6b) to head (66f25c8).

Files with missing lines	Patch %	Lines
Maths/FriendlyNumbers.js	0.00%	2 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@ ## master #1856 +/- ## ======================================= Coverage 85.91% 85.91% ======================================= Files 379 379 Lines 19778 19778 Branches 3015 3015 ======================================= Hits 16993 16993 Misses 2785 2785 

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