Minor reorg in the Arrays chapter of the spec.
Minor reorg in the Arrays chapter of the spec.

* Created "Rectangular Array Slicing with a Rank Change" as a sibling to 
"Rectangular Array Slicing", under "Array Slicing".

* Promoted "Array Aliases" into its own section, from a subsection of 
"Array Arguments to Functions".

This reorg was called for by the text in thos sub/sections.
E.g. "Array Aliases" says nothing about function calls.
As the text changes, we may reconsider the sub/section structure.
(Or the other way around.)


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@19302 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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