Merge pull request #419 from pikers/pre_multifeed_hotfix

HOTFIX: Fix `_main()` arg back to `sym: str`

Author: iamzoltan

piker/ui/cli.py

@@ -174,7 +174,7 @@ def chart(
 
 
     _main(
-        syms=symbols,
+        sym=symbols[0],
         brokernames=brokernames,
         piker_loglevel=pikerloglevel,
         tractor_kwargs={