Do not trust grep(1) to return a reasonable exit value

bin/installbfa.sh

@@ -158,7 +158,7 @@ function usersetup
     git pull
     #
     cd ~bfa
-    if expand < .bashrc | grep -Evq 'source .*bfa/bin/env'
+    if [ $( expand < .bashrc | grep -E 'source .*bfa/bin/env' | wc -l ) -eq 0 ]
     then
         info Adding to automatically source \~bfa/bfa/bin/env via .bashrc
         echo 'source ~/bfa/bin/env' >> .bashrc