replace Array{...}(shape...)-like calls in test/r*

[Sacha0]

This pull request replaces Array{...}(shape...)-like calls in test/r*.jl. Ref. #24595. Best!

[fredrikekre]

Error in testset libgit2:
Error During Test at nothing:1
  Test threw an exception of type RemoteException
  Expression: libgit2
  Error deserializing a remote exception from worker 7
  Remote(original) exception of type Test.TestSetException
  Remote stacktrace : 
  finish at /home/circleci/project/usr/share/julia/site/v0.7/Test/src/Test.jl:758
  macro expansion at ./util.jl:310 [inlined]
  top-level scope at ./<missing>:19
  eval at ./boot.jl:284
  #runtests#1 at /tmp/julia/share/julia/test/testdefs.jl:25
  #runtests at ./<missing>:0 (repeats 2 times)
  #114 at ./distributed/process_messages.jl:271
  run_work_thunk at ./distributed/process_messages.jl:56
  macro expansion at ./distributed/process_messages.jl:271 [inlined]
  #113 at ./event.jl:95
ERROR: LoadError: Test run finished with errors
in expression starting at /tmp/julia/share/julia/test/runtests.jl:44

on circle. Relevant test passed.

[Sacha0]

Thanks @fredrikekre! :)