build: tweaking travis script

.travis.yml

@@ -1,3 +1,5 @@
+language: cpp
+
 matrix:
   include:
     - os: linux
@@ -5,13 +7,10 @@ matrix:
       sudo: required
     - os: osx
       osx_image: xcode7.2
-language: cpp
-compiler:
-  - clang
-  - gcc
+
 before_install:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install groff; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install groff ; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get -qq update; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install -y groff; fi
 script: