Fix docker run command

Author: PHPirates

.travis.yml

@@ -4,9 +4,7 @@ services: docker
 
 script:
 - docker pull dxjoke/tectonic-docker:personal
-- docker run --mount src=$TRAVIS_BUILD_DIR/src,target=/usr/src/tex,type=bind dxjoke/tectonic-docker
-  /bin/sh -c "tectonic --keep-intermediates --reruns 0 biber-mwe.tex; biber biber-mwe; tectonic biber-mwe.tex"
-  /bin/sh -c "tectonic --keep-intermediates main.tex"
+- docker run --mount src=$TRAVIS_BUILD_DIR/src,target=/usr/src/tex,type=bind dxjoke/tectonic-docker /bin/sh -c "tectonic --keep-intermediates --reruns 0 biber-mwe.tex; biber biber-mwe; tectonic biber-mwe.tex; tectonic main.tex"
 deploy:
   provider: releases
   api_key: