anchor.diff:  particularly meaningful to general users and is subject to change in
   future releases.
   
  -CONVERTTOHEX returns ASCII characters in ISO8859-1 encoding.
  +CONVERTTOHEX returns ASCII characters in ISO88591 encoding.
   
   <<<
   [[examples_of_converttohex]]
  
positive.code: [[considerations_for_monthname]]
  === Considerations for MONTHNAME
  
  The MONTHNAME function returns the name of the month in ISO8859-1.
  
  [[examples_of_monthname]]
  === Examples of MONTHNAME
  
negative.code: +
  specifies the number of characters to be returned. The number _count_
  must be a value greater than or equal to zero of exact numeric data type
  and with a scale of zero. _length_ cannot exceed 32768 for the ISO88591
  or UTF8 character sets.
  
  * `_char-set-name_`
  