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Replace ":" by "-" in a text file: code:
        

     Input:
        

     Output:
            

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Relace one word by another. code:
        

     Input:
        

     Output:
        

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Change lower cases to upper cases in a text file. code:
        

     Input:
        

     Output:
        

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Convert a text file to a string. code:
        

     Input:
        

     Output:
        

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Replace a line, in a text file, which contains a string, if found. code:
        

     Input:
        

     Output: