Fixed typo in previous commit.

Changed the version of matplotlib which works with python2.

Author: Dilawar Singh

test.sh

@@ -7,8 +7,8 @@ PYTHON=$(which python)
 
 # From here https://stackoverflow.com/a/40950971/1805129
 PYTHON_VERSION=$(python -V 2>&1 | sed 's/.* \([0-9]\).\([0-9]\).*/\1\2/')
-if [ "$ver" -eq "27" ]; then
-    $PYTHON -m pip install matplotlib==2.3 --upgrade 
+if [ "$PYTHON_VERSION" -eq "27" ]; then
+    $PYTHON -m pip install matplotlib==2.2.3 --upgrade 
 else
     $PYTHON -m pip install matplotlib --upgrade 
 fi