Just ignore "script-on" tree-construction tests instead of "skipping"

Calling them "skipped" implies that they're known but unintentional
failure cases, but really they're just not applicable at all to a
non-scripted parser.

This reduces the total number of skipped tests by 8:

    Ran 1673 tests in 0.15s
    Passed: 1673
    Failed: 0
    Skipped: 16

Author: craigbarnes

test/tree-construction.lua

@@ -149,10 +149,10 @@ do
         local tests = parseTestData(filename)
         for i, test in ipairs(tests) do
             local input = assert(test.data)
-            if
-                test["script-on"]
-                or input:find("<menuitem>")
-            then
+            if test["script-on"] then
+                -- The "script-on" tests are not relevant to a non-scripted
+                -- parser, so they are just ignored instead of "skipped".
+            elseif input:find("<menuitem>") then
                 skipped = skipped + 1
             else
                 local expected = assert(test.document)