mandoc: Change the rendering of the .Ux macro from "UNIX" to "Unix",

mandoc: Change the rendering of the .Ux macro from "UNIX" to "Unix",

[schwarze]

Log Message:
-----------
Change the rendering of the .Ux macro from "UNIX" to "Unix",
purely for compatibility with groff 1.23.
Not a big deal because this macro is deprecated anyway.

The decision to change this was made in groff because two AT&T
Bell Labs veterans, Doug McIlroy and Meg McRoberts, recalled that
"fairly early on, we in the Unix lab began to treat Unix as a proper
noun, but the lawyers had trademarked the uppercase name and got
their way in many publications."

https://lists.gnu.org/archive/html/groff/2015-01/msg00026.html
https://lists.gnu.org/archive/html/groff/2015-01/msg00029.html

This cange corresponds to groff commit 8dcc3aad gbranden@ Sep 7, 2022
[mdoc]: Render `Ux` macro as "Unix", in mixed case.

Modified Files:
--------------
    mandoc:
        mdoc_validate.c

Revision Data
-------------
Index: mdoc_validate.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/mdoc_validate.c,v
diff -Lmdoc_validate.c -Lmdoc_validate.c -u -p -r1.393 -r1.394
--- mdoc_validate.c
+++ mdoc_validate.c
@@ -1714,7 +1714,7 @@ post_xx(POST_ARGS)
 		os = "OpenBSD";
 		break;
 	case MDOC_Ux:
-		os = "UNIX";
+		os = "Unix";
 		break;
 	default:
 		abort();
--
 To unsubscribe send an email to source+unsubscribe@mandoc.bsd.lv