More work on regex, fixed whitespace around && and operator= for vector

tests/test_util.krak

@@ -0,0 +1,45 @@
+import util:*
+import io:*
+
+obj test(Object) {
+    var counter:int
+    fun construct(): test* {
+        counter = 0
+        println("construct with 0")
+        return this
+    }
+
+    fun construct(it:int): test* {
+        counter = it
+        print("construct with "); println(it)
+        return this
+    }
+
+    fun copy_construct(old: test*):void {
+        counter = old->counter+1
+        print("copy construct from "); print(old->counter); print(" to "); println(counter)
+    }
+
+    fun destruct():void {
+        print("destruct with "); println(counter)
+    }
+}
+
+fun main():int {
+    println(lesser(1,2))
+    println(lesser(7.0,8.0))
+    println(greater(1,2))
+    println(greater(7.0,8.0))
+
+    var oddPair = make_pair(3, "hi")
+    println(oddPair.first)
+    println(oddPair.second)
+
+    println("construct")
+    var test1.construct():test
+    var test2.construct(100):test
+    println("make_pair")
+    var test_pair = make_pair(test1, test2)
+    println("done")
+    return 0
+}