CI changes

.travis.yml

@@ -28,6 +28,6 @@ install:
   - python setup.py -q install
   - rm -rf chemicals
 script:
-  - py.test . -v --cov-report html --cov=chemicals --cov-report term-missing -m "not online and not thermo and not numba"
+  - py.test . -v --cov-report html --cov=chemicals --cov-report term-missing -m "not online and not thermo and not numba and not slow"
 after_success:
   - coveralls

appveyor.yml

@@ -25,4 +25,4 @@ install:
   - cmd: rmdir /Q /S chemicals
 
 test_script:
-  - cmd: py.test --cov-report html --cov=chemicals -m "not slow and not online"
+  - cmd: py.test --cov-report html --cov=chemicals -m "not slow and not online and not numba"

chemicals/viscosity.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-"""Chemical Engineering Design Library (ChEDL). Utilities for process modeling.
+r"""Chemical Engineering Design Library (ChEDL). Utilities for process modeling.
 Copyright (C) 2016, 2017, 2018, 2019, 2020 Caleb Bell
 <Caleb.Andrew.Bell@gmail.com>