parse 3x as 3 .* x, not 3*x, so that literal multiplications by juxtaposition get fused

Author: stevengj

src/julia-parser.scm

@@ -865,7 +865,7 @@
            (begin
              #;(if (and (number? ex) (= ex 0))
                  (error "juxtaposition with literal \"0\""))
-             `(call * ,ex ,(parse-unary s))))
+             `(call .* ,ex ,(parse-unary s))))
           (else ex))))
 
 (define (invalid-identifier-name? ex)