Update property drawer empty test to include a variety of whitespace.

org_mode_samples/greater_element/property_drawer/empty.org

@@ -1,3 +1,32 @@
+* Empty
 :PROPERTIES:
+:END:
+* Single new line
+:PROPERTIES:
+
+:END:
+* Single line with spaces
+:PROPERTIES:
+      
+:END:
+* Many lines, first line without spaces
+:PROPERTIES:
+
+
+
+
+:END:
+* Many lines, first line with spaces
+:PROPERTIES:
+      
+
+
+
+:END:
+* Many lines, first line with spaces, later line with spaces
+:PROPERTIES:
+      
+
+    
 
 :END: