Should the single space around => be stated as a general rule instead of per construct? #154

PER explicitly requires a single space around the => symbol in two sections:

Section 7.1 (Short Closures):

The => symbol MUST be preceded and succeeded by a space.

Section 4.9 (Property Hooks):

There MUST be a single space on either side of the => symbol.

The same operator is used in other constructs, but as far as I could check the spec does not state the spacing around it explicitly for them. Arrays (section 11), match (section 5.2) and foreach (section 5.5) only show a single space in their examples. There might be other places where => is used, but I haven't checked them all.

Is there a reason the rule is stated only for short closures and property hooks that I'm missing, or would it make sense to state it as a general rule so that it applies consistently to every use of =>? If there is a reason not to create a general rule, should it be added to the array, match and foreach sections?