Put the commands informing and displaying build logs on single line

This prevents Travis log collector to add separate expansion marks to
the echo output and the actuall log output.

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>

.travis.yml

@@ -39,7 +39,5 @@ script:
         --git-repo ${TRAVIS_BUILD_DIR}
         run-tests $test_set
 after_failure:
-  - echo "Test runner output:"
-  - tail -n 5000 ci_results_${TRAVIS_BRANCH}.log
-  - echo "PEP-8 errors:"
-  - cat pep8_errors.log
+    - echo "Test runner output:"; tail -n 5000 ci_results_${TRAVIS_BRANCH}.log
+    - echo "PEP-8 errors:"; cat pep8_errors.log