Allow operator exprs to span lines

include/chaiscript/language/chaiscript_parser.hpp

@@ -1808,6 +1808,7 @@ namespace chaiscript
               retval = true;
               if (Operator_Helper(t_precedence)) {
                 do {
+                  while (Eol()) {}
                   if (!Operator(t_precedence+1)) {
                     throw exception::eval_error("Incomplete "
                         + std::string(ast_node_type_to_string(m_operators[t_precedence])) + " expression",

unittests/multiline_oper.chai

@@ -0,0 +1,4 @@
+var x = 3 + 
+  4
+
+assert_equal(x, 7);