Several subcommands have inconsistent syntax

[GrantGryczan]

The same reasoning that applies to doing this for execute.if and execute.unless subcommands also applies to these.

• execute.facing.entity
• execute.positioned.as
• execute.rotated.as
• worldborder.damage.amount
• worldborder.damage.buffer
• worldborder.warning.distance
• worldborder.warning.time
• possibly more