mixing active and static mode throws the "wrong" error

[epar]

Description

In previous versions of Processing, when mixing active and static modes the error Processing would throw was:

It looks like you're mixing "active" and "static" modes.

In Processing 4, the error becomes a lot more cryptic:

Syntax Error - Missing operator, semicolon, or '}' near 'setup'?

As this is a mistake a lot of first learners make, it would be really helpful to get the old error message back.

Steps to Reproduce

size(100, 100);

void setup() {
  
}

[sampottinger]

Great suggestion @epar. A PR will be posted shortly.

[github-actions]

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