fix: multiple dataframes for tables with different schema (#385)

Author: bednar

influxdb_client/client/query_api.py

@@ -131,7 +131,8 @@ def query_data_frame(self, query: str, org=None, data_frame_index: List[str] = N
         """
         Execute synchronous Flux query and return Pandas DataFrame.
 
-        Note that if a query returns more then one table than the client generates a DataFrame for each of them.
+        Note that if a query returns tables with differing schemas than the client generates
+        a DataFrame for each of them.
 
         :param query: the Flux query
         :param str, Organization org: specifies the organization for executing the query;
@@ -157,7 +158,8 @@ def query_data_frame_stream(self, query: str, org=None, data_frame_index: List[s
         """
         Execute synchronous Flux query and return stream of Pandas DataFrame as a Generator['pd.DataFrame'].
 
-        Note that if a query returns more then one table than the client generates a DataFrame for each of them.
+        Note that if a query returns tables with differing schemas than the client generates
+        a DataFrame for each of them.
 
         :param query: the Flux query
         :param str, Organization org: specifies the organization for executing the query;