On Sun, 2023-06-11 at 17:16 +0200, Alexander Kanavin wrote:
> Doesn't += override the earlier ?=

It depends. If ?= is parsed first, += will append. If the ?= is parsed
after +=, the ?= will not happen as the variable has a value.

>  (or ??=), 

+= would override ??=

Cheers,

Richard
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