Show short version string for bash
Show short version string for bash

Resolves https://github.com/travis-ci/travis-ci/issues/5587

craigcitro/travis-build,JuliaCI/travis-build,kevmoo/travis-build,jhass/travis-build,andyli/travis-build,kevmoo/travis-build,jhass/travis-build,akoeplinger/travis-build,andyli/travis-build,craigcitro/travis-build,JuliaCI/travis-build,akoeplinger/travis-build