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Describe your change:

Fixes: #988
Renamed the algorithm "simplified wiggle-sort", because traditional wiggle-sort demands arr[0] < arr[1] > arr[2] < arr[3] > arr[4] <... but this version only demands arr[0] <= arr[1] >= arr[2] <= arr[3] >= arr[4] <= …
For strict wiggle-sort there could be made an own implementation.

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• 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 its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.