Document missing inline implementation. Fixed #1152 (#1156)

Author: wisskid

changelog/1152.md

@@ -0,0 +1 @@
+- Update documentation to clarify that include inline is currently not implemented in Smarty v5 [#1152](https://github.com/smarty-php/smarty/issues/1152)

docs/designers/language-builtin-functions/language-function-include.md

@@ -47,11 +47,13 @@ available within the included template.
 
 ## Option Flags
 
-| Name    | Description                                                                          |
-|---------|--------------------------------------------------------------------------------------|
-| nocache | Disables caching of this subtemplate                                                 |
-| caching | Enable caching of this subtemplate                                                   |
-| inline  | If set, merge the compile-code of the subtemplate into the compiled calling template |
+| Name      | Description                                                                          |
+|-----------|--------------------------------------------------------------------------------------|
+| nocache   | Disables caching of this subtemplate                                                 |
+| caching   | Enable caching of this subtemplate                                                   |
+| inline \* | If set, merge the compile-code of the subtemplate into the compiled calling template |
+
+\* The `inline` option flag is currently not implemented in Smarty v5. Using it will not trigger an error, however.
 
 ## Examples
 ```smarty