This is a collection of independant and mostly trivial cleanups. I don't attach the combined patch as it is the concatenation of the separate patches.
Patch 07: Useless coarray code removal. Patch 08: Remove redundant condition. Patch 09: Assertify condition. Patch 10: Use array dimensions instead of loop dimensions. Patch 11: Skip temporary arrays for loopspec choice. Patch 12: Stop loop before end marker.
