Readme fixes

Author: MarkLeith

README.md

@@ -1442,7 +1442,7 @@ Requires the SUPER privilege for "SET sql_log_bin = 0;".
 
 To disable all consumers:
 ```SQL
-mysql> CALL sys.ps_setup_disable_comsumers(\'\');
+mysql> CALL sys.ps_setup_disable_comsumers('');
 +--------------------------+
 | summary                  |
 +--------------------------+
@@ -1453,7 +1453,7 @@ mysql> CALL sys.ps_setup_disable_comsumers(\'\');
 
 To disable just the event_stage consumers:
 ```SQL
-mysql> CALL sys.ps_setup_disable_comsumers(\'stage\');
+mysql> CALL sys.ps_setup_disable_comsumers('stage');
 +------------------------+
 | summary                |
 +------------------------+
@@ -1534,7 +1534,7 @@ Requires the SUPER privilege for "SET sql_log_bin = 0;".
 
 To enable all consumers:
 ```SQL
-mysql> CALL sys.ps_setup_enable_consumers(\'\');
+mysql> CALL sys.ps_setup_enable_consumers('');
 +-------------------------+
 | summary                 |
 +-------------------------+
@@ -1545,7 +1545,7 @@ mysql> CALL sys.ps_setup_enable_consumers(\'\');
 
 To enable just "waits" consumers:
 ```SQL
-mysql> CALL sys.ps_setup_enable_consumers(\'waits\');
+mysql> CALL sys.ps_setup_enable_consumers('waits');
 +-----------------------+
 | summary               |
 +-----------------------+