* Update physics_introduction.rst
The docs page for raycasting provides a link to the physics introduction page for how to set a collision mask on a raycast created in code. The physics introduction page does not mention export annotations for exporting a collision mask. This pull request adds a brief bit about exporting layer masks, and links to the export annotation docs.
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Co-authored-by: tetrapod <145553014+tetrapod00@users.noreply.github.com>
In the current style guide, the example for ternary operators includes a "not" in the conditional which is the same text color as the preceding "if" giving the impression that the format for a ternary operation is "[some_value] if not [condition] else [other_value]" which is incorrect, and may be confusing to figure out. I'm new to Godot and I've never used python (which I understand GDScript is based on). My only experience is with c# which I don't believe has a "not" keyword so I was quite confused by this.
This change would remove "not" from the condition to eliminate confusion, and rearrange the values to keep the meaning of the example code the same. Any alternative that removes the "not" would also work.
