Make .travis.yml more readable with YAML multi line syntax "|".

.travis.yml

@@ -22,18 +22,32 @@ addons:
       - cmake-data
 
 before_install:
-  - if [ "$TRAVIS_OS_NAME" == "linux" ];  then  CMAKE_INSTALLER=install-cmake.sh && curl -sSL https://cmake.org/files/v3.11/cmake-3.11.3-Linux-x86_64.sh -o ${CMAKE_INSTALLER} &&  chmod +x ${CMAKE_INSTALLER} && sudo ./${CMAKE_INSTALLER} --prefix=/usr/local --skip-license; fi
+  - |
+    if [ "$TRAVIS_OS_NAME" == "linux" ]; then
+      CMAKE_INSTALLER=install-cmake.sh && \
+        curl -sSL https://cmake.org/files/v3.11/cmake-3.11.3-Linux-x86_64.sh -o ${CMAKE_INSTALLER} && \
+        chmod +x ${CMAKE_INSTALLER} && \
+        sudo ./${CMAKE_INSTALLER} --prefix=/usr/local --skip-license
+    fi
   - alias cmake=/usr/local/bin/cmake
   - export PATH=/usr/local/bin/cmake/bin:/usr/local/bin:${PATH}
-  - if [ "$TRAVIS_OS_NAME" == "osx" ];  then echo "need cmake 3.2"; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update && brew install ccache; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew upgrade cmake; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then export PATH="/usr/local/opt/ccache/libexec:$PATH"; fi
+  - |
+    if [ "$TRAVIS_OS_NAME" == "osx" ]; then
+      echo "need cmake 3.2" && \
+        brew update && \
+        brew install ccache && \
+        brew upgrade cmake && \
+        export PATH="/usr/local/opt/ccache/libexec:$PATH"
+    fi
   - mkdir antsbin
   - cd antsbin
 
 script:
-  - cmake -DRUN_LONG_TESTS=OFF -DRUN_SHORT_TESTS=ON ./.. && make -j 2 && cd ANTS-build/ && make test
+  - |
+    cmake -DRUN_LONG_TESTS=OFF -DRUN_SHORT_TESTS=ON ./.. && \
+      make -j 2 && \
+      cd ANTS-build/ && \
+      make test
 
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