restore original decode format and suppress formatter changes

Author: PhilippSalvisberg

docs/4-language-usage/4-control-structures/2-case-if-decode-nvl-nvl2-coalesce/g-4220.md

@@ -10,7 +10,11 @@
 ## Example (bad)
 
 ``` sql
-select decode(dummy,'X',1,'Y',2,'Z',3,0)
+-- @formatter:off
+select decode(dummy, 'X', 1 
+                   , 'Y', 2
+                   , 'Z', 3
+                        , 0)
   from dual;
 ```
 
@@ -33,7 +37,11 @@ select case dummy
 ## Example (bad)
 
 ``` sql
-select decode(dummy,'X',1,'Y',2,null,- 1,0)
+-- @formatter:off
+select decode(dummy,  'X',  1 
+                   ,  'Y',  2
+                   , null, -1
+                         ,  0)
   from dual;
 ```