Fixed test + Contrib readme improvements

Author: jardayn

CONTRIBUTING.md

@@ -34,7 +34,7 @@ The same goes for other technical requests, like missing features, or gaps in th
 
 See [issues](/datafold/data-diff/issues/).
 
-For questions, and non-technical discussions, see [discussions](/datafold/data-diff/discussions).
+For questions, and non-technical discussions, see [discussions](https://github.com/datafold/data-diff/discussions).
 
 ### Contributing code
 

tests/test_cli.py

@@ -37,7 +37,7 @@ def setUp(self) -> None:
 
         src_table = table(table_src_name, schema={"id": int, "datetime": datetime, "text_comment": str})
         self.conn.query(src_table.create())
-        self.now = now = arrow.get()
+        self.now = now = arrow.get(datetime.now())
 
         rows = [
             (now, "now"),