Tweaking docstring

Author: Jason Ng

pandas_gbq/gbq.py

@@ -810,21 +810,14 @@ def from_gbq(query, project_id=None, index_col=None, col_order=None,
         <https://cloud.google.com/bigquery/sql-reference/>`__
     configuration : dict (optional)
         Because of current limitations (https://github.com/GoogleCloudPlatform/google-cloud-python/issues/2765)
-        only a certain number of configuration settings are currently implemented. You can set them 
-        like in the following: `from_gbq(q,configuration={'allow_large_results':True,'use_legacy_sql':False})`
-        Current allowable settings: 
-        -allow_large_results
-        -create_disposition
-        -default_dataset
-        -destination
-        -flatten_results
-        -priority
-        -use_query_cache
-        -use_legacy_sql
-        -dry_run
-        -write_disposition
-        -maximum_billing_tier
-        -maximum_bytes_billed
+        only some configuration settings are currently implemented. You can pass them 
+        along like in the following: 
+        `from_gbq(q,configuration={'allow_large_results':True,'maximum_billing_tier':2})`
+        
+        Example allowable settings: 
+            allow_large_results, create_disposition, default_dataset, destination
+            flatten_results, priority, use_query_cache, use_legacy_sql, dry_run, 
+            write_disposition, udf_resources, maximum_billing_tier, maximum_bytes_billed
 
     Returns
     -------