Fix style issues

Author: greigwise

bin/metric-postgres-connections.rb

@@ -83,12 +83,12 @@ def run
     request = [
       "select case when count(*) = 1 then 'waiting' else",
       "'case when wait_event_type is null then false else true end' end as wait_col",
-      "from information_schema.columns",
+      'from information_schema.columns',
       "where table_name = 'pg_stat_activity' and table_schema = 'pg_catalog'",
       "and column_name = 'waiting'"
     ]
     wait_col = con.exec(request.join(' ')).first['wait_col']
-    
+
     request = [
       "select count(*), #{wait_col} as waiting from pg_stat_activity",
       "where datname = '#{config[:database]}' group by #{wait_col}"