Use dash instead of bash on the Travis CI machines.
Use dash instead of bash on the Travis CI machines.

On some Linux server machines, /bin/sh points to the "dash" shell,
a minimalistic shell implementation that does not support many
bash-isms. This means that Makefiles that work on developer machines
(typically using bash or other rich shells) may silently break in
other environments. Using a minimalistic shell implementation in
testing should help catch non-portable Make rules.

(no change entry needed)

gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml