Syntax change with tremolo and articulation

[Urs Liska]

Hi,

I'm experiencing a syntax change:

{

bes8:16->

}

This doesn't compile with 2.18.2 because

"

error: expecting string as script definition
"

It does compile with 2.19.4 (which is the oldest one > 2.18.2 I have available).
Can anyone tell me when this was changed, i.e. what I should use as version requirement?

TIA
Urs

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