pytestCheckHook: Fix support for multiple files.

Quoting here will lead to the shell treating them as a single item.

pkgs/development/interpreters/python/hooks/pytest-check-hook.sh

@@ -37,7 +37,7 @@ function pytestCheckPhase() {
         disabledTestsString=$(_pytestComputeDisabledTestsString "${disabledTests[@]}")
       args+=" -k \""$disabledTestsString"\""
     fi
-    for file in "${disabledTestFiles[@]}"; do
+    for file in ${disabledTestFiles[@]}; do
       if [ ! -f "$file" ]; then
         echo "Disabled test file \"$file\" does not exist. Aborting"
         exit 1