fix: case where setting start as __START__ would break the end pattern

Signed-off-by: thiswillbeyourgithub <26625900+thiswillbeyourgithub@users.noreply.github.com>

Author: thiswillbeyourgithub

MdXLogseqTODOSync/MdXLogseqTODOSync.py

@@ -169,6 +169,9 @@ def process_input(self) -> list[str]:
             # Check for delimiter markers
             if start_delim == "__START__":
                 inside_section = True
+                start_delim = "a"
+                while start_delim in content:
+                    start_delim *= 2
             elif re.findall(start_delim, block_content):
                 inside_section = True
                 continue