add a multi-byte character as fodder for the random tester (since byte regexps are being used in various places)

Author: rfindler

syntax-color-test/tests/syntax-color/scribble-lexer.rkt

@@ -56,7 +56,7 @@
            (parameterize ([current-lexer-char char])
              (test* (string-replace str "@" (string char)) len-val line))))]))
 
-(define chars '(#\@ #\+ #\- #\\ #\^))
+(define chars '(#\@ #\+ #\- #\\ #\^ #\α))
 
 (test/chars chars "x" '((1 text)))
 (test/chars chars "x{}" '((3 text)))