added a test for 'nim doc'

nimdoc/testproject/testproject.nim

@@ -0,0 +1,21 @@
+
+import subdir / subdir_b / utils
+
+## This is the top level module.
+runnableExamples:
+  doAssert bar(3, 4) == 7
+  foo(1, 2)
+
+
+template foo*(a, b: SomeType) =
+  ## This does nothing
+  ##
+  discard
+
+proc bar*[T](a, b: T): T =
+  result = a + b
+
+import std/macros
+
+macro bar*(): untyped =
+  result = newStmtList()