Fixed empty code blocks in included examples

Ticket: ENT-14130
Signed-off-by: Ihor Aleksandrychiev <ihor.aleksandrychiev@northern.tech>

Author: aleksandrychev

generator/_scripts/cfdoc_macros.py

@@ -749,6 +749,10 @@ def include_snippet(parameters, config):
             if line.find("#[%-%]") == 0:
                 skip_block = True
                 continue
+            # org-mode src markers are just delimiters, not content. Skip them so they
+            # don't trip the in_documentation toggle below and open an empty code block.
+            if line.startswith("#+begin_src") or line.startswith("#+end_src"):
+                continue
             # #@ interrupts code block, interpret documentation in example code
             if line.find("#@ ") == 0:
                 line = line[3:]