fix alias usage in git-pull-and-run-if-origin-changed

bin/git-pull-and-if-origin-changed-run-tests

@@ -1,13 +1,5 @@
 #!/bin/bash
 
-if [ -z "$1" ]; then
-  echo "command missing in arguments" >&2
-  exit 1
-fi
-
-shopt -s expand_aliases
-source .aliases
-
 # get the current branch name
 BRANCH=$(git rev-parse --abbrev-ref HEAD)
 
@@ -24,8 +16,10 @@ while true; do
     git pull origin $BRANCH
 
     # run the command
-    echo "Running $*"
-    "$@"
+    echo "Running gw-test"
+    shopt -s expand_aliases
+    source .aliases
+    gw-test
   else
     echo "no changes detected on the origin branch"
   fi