input: 
  from typing import List, Union
  
  
  def eliminate_redundancies(code: Union[str, List[str]]) -> str:
      """Modify an existing Python function to eliminate any redundancies.
      Assume the input is a string of Python code or a list of strings representing the lines of code.
      Ensure the output is a single string of the modified function.
      
      >>> eliminate_redundancies('''def just_me(name):\n    print("Hi, my name is "+name+".")\n    print("I am special and nothing else matters.")\n    print("What about you?")''')
      "def just_me(name):\n    print('Hi, my name is ' + name + '. I am special and nothing else matters.')\n    print('What about you?')\n"
      >>> eliminate_redundancies(["def just_me(name):", '    print("Hi, my name is "+name+".")', '    print("I am special and nothing else matters.")', '    print("What about you?")'])
      "def just_me(name):\n    print('Hi, my name is ' + name + '. I am special and nothing else matters.')\n    print('What about you?')\n"
      """
  
output:     
      import ast
      import astor
  
      class RedundancyEliminator(ast.NodeTransformer):
          def visit_Print(self, node):
              if isinstance(node.values[0], ast.BinOp) and isinstance(node.values[0].op, ast.Add):
                  new_value = ast.BinOp(left=node.values[0].left, op=ast.Add(), right=node.values[0].right)
                  if len(node.values) > 1:
                      for value in node.values[1:]:
                          new_value = ast.BinOp(left=new_value, op=ast.Add(), right=value)
                  node.values = [new_value]
              return self.generic_visit(node)
  
      if isinstance(code, list):
          code = '\n'.join(code)
  
      tree = ast.parse(code)
      RedundancyEliminator().visit(tree)
      return astor.to_source(tree).strip()
  