Fix error in logging

Author: matteobachetti

hendrics/io.py

@@ -382,7 +382,7 @@ def save_as_netcdf(vars, varnames, formats, fname):
             else:
                 vnc[:] = v
         except Exception:
-            log.error("Bad variable:", varnames[iv], formats[iv], dimspec, v)
+            log.error(f"Bad variable: {varnames[iv]}, {formats[iv]}, {dimspec}, {v}")
             raise
     rootgrp.close()