Log Message:
Changes in version 2.47
-----------------------
* Fix bug https://rt.cpan.org/Ticket/Display.html?id=89513.
  - Should have done that earlier :)
  - This changes the format for accepted float numbers:
    <optional sign>
    <optional mantissa>
    <optional dec.point and fraction>
    <optional "e" and exponent>
  - Mantissa and decimal fraction may not both be omitted.
  - Underscores are permissible virtually anywhere in numbers for clarity.