Question: Given a string, return a string where for every char in the original, there are two chars. double _ char ( ' The ' )

Given a string, return a string where for every char in the original, there are two chars. double_char('The')-> 'TThhee' double_char('AAbb')-> 'AAAAbbbb' double_char('Hi-There')-> 'HHii--TThheerree'

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