mandoc: Fix this test after the recent Unicode update in OpenBSD base.

mandoc: Fix this test after the recent Unicode update in OpenBSD base.

[schwarze]

Log Message:
-----------
Fix this test after the recent Unicode update in OpenBSD base.
The test uses U+07FF NKO TAMAN SIGN because it is the highest 
code point having a two-byte UTF-8 representation.
This character is a new single-width punctuation character in 
Unicode 11, such that mandoc now does correct horizontal spacing.
We already used the code point for the test before it was assigned,
which resulted in weird spacing because wcwidth(3) returns -1 for 
unassigned code points.

Modified Files:
--------------
    mandoc/regress/char/unicode:
        input.out_utf8

Revision Data
-------------
Index: input.out_utf8
===================================================================
RCS file: /home/cvs/mandoc/mandoc/regress/char/unicode/input.out_utf8,v
retrieving revision 1.1
retrieving revision 1.2
diff -Lregress/char/unicode/input.out_utf8 -Lregress/char/unicode/input.out_utf8 -u -p -r1.1 -r1.2
--- regress/char/unicode/input.out_utf8
+++ regress/char/unicode/input.out_utf8
@@ -23,7 +23,7 @@ D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
                 0xc278     ?x   ASCII continuation
        U+0080   0xc280     ��   lowest two-byte
                 0xc2c380   ?À   high continuation
-       U+07FF   0xdfbf     ߿߿     highest two-byte
+       U+07FF   0xdfbf     ߿߿   highest two-byte
 
    T\bTh\bhr\bre\bee\be-\b-b\bby\byt\bte\be r\bra\ban\bng\bge\be
 
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