Ensure that section heading appears in reference documentation
Asciidoctor appears to apply two blanks lines beneath a code block
at the end of an included file otherwise the section heading that
opens the following included file will be omitted.
Closes
@@ -1199,3 +1199,4 @@ and adds a title:
<1> Add a title to the table
<2> Add a new column named "Constraints"
<3> Include the descriptors' `constraints` attribute in each row of the table
+
