Mixed‑Indent Mayhem: Tabs → Two‑Space Salvation

A new dev just joined the team—and they’re on Team Tab. Our codebase is littered in parts with these rogue tabs that are just an eyesore for everyone. Convert every leading tab to two spaces!

challenge.txt :set list

Start

 1class CoffeeMachine
 2→   def start_brew
 3→   →   puts "Brewing..."
 4    cleanup
 5→   end
 6
 7→   def legacy_mode
 8        puts "Legacy only"
 9  →   end
10end

Goal

 1class CoffeeMachine
 2  def start_brew
 3    puts "Brewing..."
 4    cleanup
 5  end
 6
 7  def legacy_mode
 8    puts "Legacy only"
 9  end
10end

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