For everyone's critique, here are my changes (to grep 3.11):
diff -u doc/grep.in.1.orig doc/grep.in.1
--- doc/grep.in.1.orig 2024-04-28 18:04:37.494096472 -0400
+++ doc/grep.in.1 2024-04-28 18:24:15.187984393 -0400
@@ -2,7 +2,7 @@
.de dT
.ds Dt \\$2
..
-.dT Time-stamp: "2019-12-29"
+.dT
Antonio Diaz Diaz writes:
> Dale R. Worley wrote:
>> What doesn't seem to exist is something that does step 2 in a general
>> way. The tool that is needed is something that reads the first few
>> bytes of a file, determines which compression signature is present if
>> any, then processes the