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For challenges related to the processing and placement of whitespace characters (mainly, but not limited to spaces, tabs and line feeds), like challenges related to indentation. For challenges about the esoteric programming language Whitespace, use [whitespace-language] instead.
5
votes
Get rid of whitespace on otherwise empty lines
AWK by default uses all whitespace as separator between fields
If there are no fields, change the input line to an empty string
Print the line. …