test: fix failed tests

Author: adrienaury

tests/suites/push/import.yml

@@ -149,6 +149,6 @@ testcases:
           EOF
       - script: lino pull source --table customer --filter customer_id=1 | lino push update dest --table customer -vdebug
         assertions:
-          - result.systemerr ShouldContainSubstring "UPDATE \"customer\" SET first_name=$1 WHERE customer_id=$2"
+          - result.systemerr ShouldContainSubstring 'UPDATE "customer" SET first_name=$1 WHERE customer_id=$2'
           - result.code ShouldEqual 0
           - result.systemout ShouldBeEmpty