#1213 added very basic test file for D

tests/syntax-tests/highlighted/D/test.d

@@ -0,0 +1,23 @@
+import std.stdio;
+import std.algorithm;
+import std.range;
+
+/* a multiline comment
+*
+*/
+int the_ultimate_answer() {
+	return 42;
+}
+
+void main()
+{
+    // function call with string literal
+    writeln("Hello World!");
+
+    // an int array declaration
+    int[] arr1 = [1, 2, 3];
+    // a double
+    double d1 = 3.14;
+    // another function call 
+    writefln("%s\n%s\n%s\n", arr1, d1, the_ultimate_answer());
+}