Don't test documentation_update

.travis.yml

@@ -4,27 +4,30 @@ addons:
   apt:
     packages:
        # Requirements for Brian & NEST
-    - python-numpy 
-    - python-scipy 
-    - python-matplotlib 
+    - python-numpy
+    - python-scipy
+    - python-matplotlib
     - python-sympy
         # Requirements for NetPyNE & libNeuroML
     - python-tk
-    - python-lxml        
-    - python-tornado        
+    - python-lxml
+    - python-tornado
         # Requirements for Moose
     - python-dev
     - libhdf5-dev
-    - libgsl0-dev 
+    - libgsl0-dev
     - g++
 
 
 language: python
- 
-python: 
+
+python:
   - 2.7
   - 3.7
 
+branches:
+  except:
+  - documentation_update
 
 env:
     - OMV_ENGINE=jNeuroML
@@ -36,31 +39,31 @@ env:
     #- OMV_ENGINE=jNeuroML_Moose # issue on xenial and python 3?
     - OMV_ENGINE=jNeuroML_validate
 
-install: 
-    
+install:
+
     - pip install kiwisolver==1.1.0 #  Temporary, due to issues with 1.2.0
     - export main_repo_branch=$TRAVIS_BRANCH
     - echo $main_repo_branch
     - if [[ ${main_repo_branch} != "master" && ${main_repo_branch} != "development" && ${main_repo_branch} != "experimental" ]]; then main_repo_branch=development ; fi
-    
+
     - mvn install
-    
+
     - git clone https://github.com/NeuroML/jNeuroML.git
     - cd jNeuroML
     - git checkout $main_repo_branch
-    
+
     - python getNeuroML.py $main_repo_branch  # will call mvn install on this & other repos
     - ls -alt
     - mvn dependency:tree
-    
+
     - export PATH=$PATH:$TRAVIS_BUILD_DIR/jNeuroML
     - export JNML_HOME=$TRAVIS_BUILD_DIR/jNeuroML
     - cd
     - pip install git+https://github.com/OpenSourceBrain/osb-model-validation
-    
+
     - pip install matplotlib>=2.2.5 # This is more because Matplotlib v2.x is required...
     - pip install future pandas matplotlib-scalebar bokeh scipy
-    
+
 
 script:
     - jnml -v
@@ -69,5 +72,4 @@ script:
     - ls -alt
     - if [ "$TRAVIS_PYTHON_VERSION" == "2.7" ]; then omv all -V; else omv all -V --ignore-non-py3; fi
     - omv list -V
-    - java -version 
-
+    - java -version