Fix signature split (for cases like float[:,:])

3 jobs for topic/default/fix-pythran-signature-no-space in 10 minutes and 39 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #166572
step_pythran_cython

00:08:59

passed #166571
step_pythran_then_cython

00:10:39

passed #166570
step_without_pythran

00:03:35