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What’s the difference between…
File.open('abc', 'w') { |f| f.puts 'abcde' } …and…
File.open('abc', 'w') { |f| f.write 'abcde' } …?
puts appends a newline, write does not. Technically, puts appends the record separator (which is usually a newline) to the output if it doesn’t have one at the end. write outputs only what it is given.