fix: ignore warnings coming from git

Author: peter-jerry-ye

next/sources/workspace/workspace.cram

@@ -1,8 +1,8 @@
 Workspace command transcript
   $ cd "$TMPDIR"
 
-  $ moon new module_a >/dev/null
-  $ moon new module_b >/dev/null
+  $ moon new module_a >/dev/null 2>&1
+  $ moon new module_b >/dev/null 2>&1
 
   $ moon work init module_a module_b
   Created moon.work
@@ -12,7 +12,7 @@ Workspace command transcript
   $ grep '"./module_b"' moon.work
     "./module_b",
 
-  $ moon new module_c >/dev/null
+  $ moon new module_c >/dev/null 2>&1
   $ moon work use module_c
   Updated moon.work
   $ grep '"./module_c"' moon.work