Support escaped character literal

aycabta · aycabta · commit 4a690f0c99ee · 2017-08-14T06:12:42.000+09:00
diff --git a/lib/rdoc/ruby_lex.rb b/lib/rdoc/ruby_lex.rb
@@ -602,6 +602,7 @@ def lex_init()
           Token(TkQUESTION)
         else
           @lex_state = :EXPR_END
+          ch << getc if "\\" == ch
           Token(TkCHAR, "?#{ch}")
         end
       end
