fix the yaml file

.travis.yml

@@ -31,7 +31,8 @@ script:
   - docker exec ubuntu-build add-apt-repository -s ppa:kernsuite/kern-3 -y
   - docker exec ubuntu-build apt-add-repository multiverse
   - docker exec ubuntu-build apt-get -qq update && sudo apt-get install -y git cmake g++ pkg-config libcfitsio-bin libcfitsio-dev libopenblas-base libopenblas-dev wcslib-dev wcslib-tools libglib2.0-dev libcasa-casa2 casacore-dev casacore-data casacore-tools
-  - docker exec ubuntu-build \
+  - |
+    docker exec ubuntu-build \
         echo "Building SageCal" && \ 
         cd $TRAVIS_HOME && \
         git clone -b sprint_cmake https://github.com/nlesc-dirac/sagecal.git && \
@@ -42,3 +43,4 @@ script:
         #cd $TRAVIS_BUILD_DIR && \
         ls -alsrt ./dist/bin && \
         ./dist/bin/sagecal
+