Log Message:
Update to 1.991

Upstream changes:
 Changes for version 1.991 - 2022-01-21

    Enforce text files in some functions, as warned in #18.
    Change up some diag messages: 1) lowercase first letter 2) not ! at end, and \ 
3) use "file" instead of "filename". If you were matching on \ 
those, you may need to update your patterns.