CSE Machine: Fixed bug in for loops

[chuckyang123]

Description

changes initialisation in for loops to fit Source specification as per #1727

Type of change

• Bug fix (non-breaking change which fixes an issue)

How to test

let y=0;
for (let i=(y=y+1);i<=1;i=i+1){
display(i);
}
now runs through a loop and display 1 instead of undefined

Checklist

• I have tested this code

[alsonleej]

added fix for Block evaluation too fast #1735

[coveralls]

Pull Request Test Coverage Report for Build 13370369039

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.002%) to 81.652%

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Totals
Change from base Build 12903670513:	-0.002%
Covered Lines:	11472
Relevant Lines:	13661

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💛 - Coveralls

[martin-henz]

Looks good!