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  1. using System;
  2. using System.Linq;
  3. using System.Text.RegularExpressions;
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8.  
  9. 		var str = "This is a really long test string is this is this is this is this is this is this is thisit is this this has to be way more than 85 characters ssssssssssss";
  10. 		Console.WriteLine(Regex.Replace(str, @"(?s).{0,85}", 
  11. 				m => m.Value.EndsWith("\n") ? m.Value + "\t" : m.Value + "\n\t"));
  12. 	}
  13. }
  14.  
  15.  
  16.  
  17.  
  18.  
  19.  
Success #stdin #stdout 0.13s 24904KB
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stdin
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Standard input is empty
stdout
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This is a really long test string is this is this is this is this is this is this is 
	thisit is this this has to be way more than 85 characters ssssssssssss
https://ideone.com/TFzQL1
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
secret

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