Bug in syntax for new numpy version

Author: rtavenar

.travis.yml

@@ -26,7 +26,7 @@ before_script: # configure a headless display to test plot generation
 # command to install dependencies
 install:
   - pip install -r requirements.txt
-  - pip install numpy>=1.14 "scipy<1.3"  # for numpy array formatting in doctests
+  - pip install "numpy>=1.14" "scipy<1.3"  # for numpy array formatting in doctests
   # ^ scipy version: otherwise, pymanopt fails, cf <https://github.com/pymanopt/pymanopt/issues/77>
   - python -c "import numpy; import scipy; print('numpy: ', numpy.__version__); print('scipy: ', scipy.__version__)"
   - pip install flake8 pytest "pytest-cov<2.6"