run doctests on python 3.6 build

Author: jorisvandenbossche

.travis.yml

@@ -49,10 +49,9 @@ matrix:
         apt:
           packages:
           - python-gtk2
-    # In allow_failures
     - dist: trusty
       env:
-        - JOB="3.6" TEST_ARGS="--skip-slow --skip-network" PANDAS_TESTING_MODE="deprecate" CONDA_FORGE=true COVERAGE=true
+        - JOB="3.6" TEST_ARGS="--skip-slow --skip-network" PANDAS_TESTING_MODE="deprecate" CONDA_FORGE=true COVERAGE=true DOCTEST=true
     # In allow_failures
     - dist: trusty
       env:

ci/doctests.sh

@@ -8,7 +8,7 @@ cd "$TRAVIS_BUILD_DIR"
 
 RET=0
 
-if [ "$LINT" ]; then
+if [ "$DOCTEST" ]; then
 
     echo "Running doctests"