capitalize_first_char_of_str
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.. py:function:: petpal.utils.useful_functions.capitalize_first_char_of_str(input_str: str) -> str

   Capitalize only the first character of a string, leaving the remainder unchanged.
   :param input_str: The string to capitalize the first character of.
   :type input_str: str

   :returns: *output_str (str)* -- The string with only the first character capitalized.