getopt 1.20.4

• Documentation tweaks eliminating a CRAN check NOTE.
• {covr} is no longer a "suggested" package in the DESCRIPTION file.

getopt 1.20.3

• Now by default getopt won't override a user specified opt argument if argv is in the global environment.
  Will continue to use argv as a default for opt if it is in the global environment and the user does not specify an opt argument (for littler compatibility).

Version 1.20.2

• Now allows one to pass an empty string to a character option.
  Thanks Matthew Flickinger for bug report.

getopt 1.20.1

• Now explicitly imports the na.omit() method from the stats package.
  Thanks Derrick Oswald for bug report.
• Improved parsing for negative numbers preceded by a space instead of a '=' sign.
  Thanks Roman Zenka for improved regular expression.
• Slightly more informative error message if storage.mode() coercion results in an NA.
  Thanks Roman Zenka for suggestion.