add fix to upstream test script for OSX
add fix to upstream test script for OSX

- use old-fashioned sed update in place technique w/ tmp file
- switch from plus to asterisk in regexp

lefou/asciidoctorj,robertpanzer/asciidoctorj,ysb33r/asciidoctorj,ysb33r/asciidoctorj,abelsromero/asciidoctorj,abelsromero/asciidoctorj,lefou/asciidoctorj,lefou/asciidoctorj,asciidoctor/asciidoctorj,robertpanzer/asciidoctorj,ysb33r/asciidoctorj,abelsromero/asciidoctorj,asciidoctor/asciidoctorj,lefou/asciidoctorj,asciidoctor/asciidoctorj,robertpanzer/asciidoctorj,ysb33r/asciidoctorj