I downloaded the entire MIT Scheme release backlog from GNU using:
wget --mirror --no-host-directories --no-parent --cut-dirs 3
https://ftp.gnu.org/gnu/mit-scheme/stable.pkg/
The Unix tool `fdupes` says that the following two files are duplicates:
9.1/mit-scheme-9.1-i386-win32.exe
9.1.1/mit-scheme-9.1.1-i386-win32.exe
The grep-like tool Silver Searcher (aka `ag`) finds the following:
$ ag 'mit-scheme-9.1.*-i386-win32.exe'
9.1/md5sums.txt:5:d95ae11d6b25337d4af8554af4600d63
mit-scheme-9.1-i386-win32.exe
In other words:
* There is an entry for mit-scheme-9.1-i386-win32.exe in 9.1/md5sums.txt.
* But there is no corresponding entry for
mit-scheme-9.1.1-i386-win32.exe in 9.1.1/md5sums.txt.
Based on the above, I assume that mit-scheme-9.1-i386-win32.exe is
intended to be in the file archive whereas
mit-scheme-9.1.1-i386-win32.exe is there by mistake.
