There is a problem with the new ?= operator when it is directly on a value.

[DragonKnightOfBreeze]

          There is a problem with the new ?= operator when it is directly on a value.

Example and a few tests:

All of the above should be valid.

Originally posted by @kaiser-chris in #102 (comment)

[DragonKnightOfBreeze]

Fixed by modify the flex file.

Note:
by plugin code, cwt files and script files are more different.
in cwt files, <event> = xxx is valid,
but in script files, <event> = xxx is invalid, and it may be confused with event>=xxx,
so in general, it's better to add spaces around property separators in cwt files.