Misplaced Unity Guidelines

[greystar93]

I question whether two of these guidelines belong in the English Style Guide:

• animated GIFs Use animated GIFs only once for an operation. When repeating the operation, use either a screenshot or refer the reader back to the animated GIF. [Note: Changed gif to GIF, as per English Style Guide rule re: file extensions.]
• spoilers Use spoilers to "quiz" readers on repeated operations in the tutorial.

I would argue these are writing guidelines. In fact, there's a section on animated GIFs in the Writing Guide.

I also wonder if these two guidelines can be applied to tutorials generally, not just to Unity tutorials? I think we need to move them somewhere, either to the Writing Guide or to a separate Unity guide.

[greystar93]

@VegetarianZombie Could you move these to the Writing Guide? I don't have access. Thanks!

[crispy8888]

@wlinc @greystar93 - serial comma note and examples have been added to the
guide. It's a bit redundant, seeing as we already note adherence to AP
style, but most authors wouldn't know that AP prescribes this style.

On the subject of menu navigation: echo whatever the casing is of the menu
item itself. If it's "Open file..." then use that. If it's "Kill with FIRE"
then use that.