Description lines starting with `x` are considered cancelled tasks

[NotWearingPants]

I had something like the following file:

☐ write this code
	```py
	x = 3
	y = 4
	```

This caused the extension to show I have 2 items instead of one, since it thought the line assigning to x is a cancelled todo item.

I know the extension doesn't support code blocks, but this is weird regardless of code block or not.

Are there users that use a bare x to mark cancelled todos? Or can this prefix be removed since it causes false positives?

This will mislabel any line starting with x, like if someone writes x mas or x marks the spot or something.

[fabiospampinato]

"x" is one of the supported symbols for cancellation 🤔 I'm not sure how this could be fixed.