tests.rs: update for iterator methods rename
Simplify intersperse iterator
tests/stride.rs: remove "extern crate debug"
Remove use of the debug crate
Merge remote-tracking branch 'ema-fox/master'

* ema-fox/master:
  tests.rs: update for iterator methods rename
Merge remote-tracking branch 'ema-fox/intersperse'

* ema-fox/intersperse:
  tests/stride.rs: remove "extern crate debug"
  Simplify intersperse iterator