How is configuration control (version numbers) maintained for the IDL Astronomy Library?
Unfortunately, I do not have the facilities to maintain strict configuration control. Procedures in the download site are updated as soon as a bug fix or enhancement has been implemented and tested for backwards compatibility. The tar and zip files are updated roughly every month. (Therefore, the ASCII file version of a procedure may be up to a month newer than what is found in the tar file.) Every change is recorded in the “Revision History” section of the documentation header, and is also recorded in the news file.