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Partially revert 2a33b499a3d7f46dc307234847a6562cef6cf1d8, where all
syn match makeIdent are moved before syn region makeIdent to match $()
(reason: see https://github.com/vim/vim/pull/18403#issuecomment-3341161566)
However this results in https://github.com/vim/vim/issues/18890 ,
because lines like
`$(a) =`
will first start a region search beginning with `$(`
but then the whole target including `)` will be matched by
`syn match makeIdent "^ *[^:#= \t]*\s*="me=e-1`
which leaves the region search for the never-found `)` and let the
region matching overflow.
Same for
`$(a) ::`
`$(a) +=`
The solution is to move those greedy target match back, so they take
priority and prevents region match from happening.
fixes: vim/vim#18890
closes: vim/vim#18938
aded55463a
Co-authored-by: Yiyang Wu <xgreenlandforwyy@gmail.com>