anchor.diff:   *                     is implied as 10 unless a leading 0 is encountered in
    *                     which 8 is implied.
    *
  - * @return true on success; otherwise, false on failure.
  + * @retval  0 on success.
  + * @retval  #EINVAL if the given base contains an unsupported value or if no
  + *          conversion was performed.
  + * @retval  #ERANGE if the resulting value was out of range.
    */
   ----
   [.text-center]
  
positive.code: 
  ==== Functions and Methods
  
  Every public, and ideally private, free function and class method should
  likewise have a prologue comment that:
  
  * Briefly describes what it is and what it does.
  * Describes in detail, optionally, what it is and what it does.
  * Describes the purpose, function, and influence of each parameter as
  well as whether it is an input, an output, or both.
  * Describes the return value, if present, and the expected range or
  constraints of it.
  
  An example is shown in Listing 3 below for C, C{plusplus}, Objective C, and
  Objective C{plusplus}. Adapt as appropriate for Perl, Python and Shell.
  
negative.code: Due to Project CHIP’s infrastructure nature, it will be consumed by
  other teams, both inside and outside Project CHIP. Therefore it is
  critical that how it works, how it behaves, and how it is
  interfaced with are **clearly** documented.
  
  In support of this effort Project CHIP uses
  http://www.doxygen.org/[Doxygen] to
  