add knr test variant for no_space_after_keyword

The generator is so outdated and basic that it didn't generate this.

tests/knr/space_after_keywords.d.ref

@@ -0,0 +1,12 @@
+void main(string[] args)
+{
+    for(int i = 0; i < 10; ++i) {
+        if(i == 9)
+            break;
+    }
+    while(false) {
+    }
+
+    foreach(i; 0 .. 9) {
+    }
+}