Improve dict export

[joente]

Description

While the export of a dict object works, the formatting could be improved.

Currently:

dict([
    [uuid('...'),0],  // uuid keys -> no space
    [0, 1],  // int keys -> correct
    ["a",2],  // str keys -> no space
])  // new line after dict
,  

Three issues could be improved:

• space after comma in uuid keys
• space after comma in str keys
• no new line after export dict with keys

Type of change

• Cosmetic improvement

How Has This Been Tested?

• Test advanced

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes