Improve test coverage

tests/test_text/test_core_counting.py

@@ -92,7 +92,8 @@ def testTextCounting_standardCounter():
         "# Heading One\n"
         "## Heading Two\n"
         "### Heading Three\n"
-        "#### Heading Four\n\n"
+        "###! Heading Four\n"
+        "#### Heading Five\n\n"
         "@tag: value\n\n"
         "% A comment that should not be counted.\n\n"
         "The first paragraph.\n\n"
@@ -100,8 +101,8 @@ def testTextCounting_standardCounter():
         "The third paragraph.\n\n"
         "Dashes\u2013and even longer\u2014dashes."
     ))
-    assert cC == 151
-    assert wC == 24
+    assert cC == 163
+    assert wC == 26
     assert pC == 4
 
     # Text Alignment