===================================================================
RCS file: /cvs/mandoc/regress/roff/char/badarg.out_lint,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -p -r1.1 -r1.2
--- mandoc/regress/roff/char/badarg.out_lint	2018/08/25 16:53:40	1.1
+++ mandoc/regress/roff/char/badarg.out_lint	2022/06/05 13:54:14	1.2
@@ -1,6 +1,6 @@
 mandoc: badarg.in:6:6: ERROR: argument is not a character: char 
 mandoc: badarg.in:7:7: ERROR: argument is not a character: char \fR myval
-mandoc: badarg.in:8:7: WARNING: invalid escape sequence: \[myc]
+mandoc: badarg.in:8:7: ERROR: unknown special character: \[myc]
 mandoc: badarg.in:8:7: ERROR: argument is not a character: char \[myc]x myval
 mandoc: badarg.in:9:7: ERROR: argument is not a character: char xy myval
-mandoc: badarg.in:10:7: WARNING: invalid escape sequence: \[myc]
+mandoc: badarg.in:10:7: ERROR: unknown special character: \[myc]