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Learning about whats new in 13.3

This is based on https://writings.stephenwolfram.com/2023/06/llm-tech-and-a-lot-more-version-13-3-of-wolfram-language-and-mathematica/. There is at least one significant difference where I couldn't get a contour integral of Pacman to work for some reason. That is why I am creating this post, partly to ask for help on integrating Pacman.
POSTED BY: Peter Burbery
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Yes it also works now. The syntax coloring has not been updated.
POSTED BY: Peter Burbery

Yes, it works for me too, but the second half of the code Disk[{0, 0}, 1, {Pi/6, 11 Pi/6}] is colored red. Syntax coloring has not been updated to the new syntax of Disk, apparently.
POSTED BY: Gianluca Gorni

Works fine:

ContourIntegrate[1/(z - a), z \[Element] RegionBoundary[Disk[{0, 0}, 1, {Pi/6, 11 Pi/6}]]]

(*ConditionalExpression[Piecewise[{{(2*I)*Pi, (Abs[a] < 1 && Arg[a] > Pi/6) || (Abs[a] < 1 && Arg[a] < -1/6*Pi)}}, 0], 
 (Abs[a] != 1 || (Pi + 6*Arg[a] >= 0 && 6*Arg[a] <= Pi)) && ((6*Arg[a] != Pi && Pi + 6*Arg[a] != 0) || Abs[a] > 1) && a != 0]*)

Regards.
POSTED BY: Mariusz Iwaniuk
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