Small bugfix for re character class parsing

+ update to the printing of regexes

src/re.cpp

@@ -80,7 +80,7 @@ namespace lxs {
 
     string PlusRE::toRe()
     {
-        return "(" + e->toRe() + "+" + f->toRe() + ")";
+        return "(" + e->toRe() + "|" + f->toRe() + ")";
     }
 
     State PlusRE::toENFA(ENFA& enfa, State attach)
@@ -242,7 +242,6 @@ namespace lxs {
             
             if (idx >= input.size())
                 throw SyntaxError("Unclosed character class");
-            idx++; //Eat the ]
 
             for (int i = 0; i < 256; i++)
             {