FEAT: improves lexer events returned value description (relates to re…

…d#5444)

en/lexer.adoc

@@ -204,15 +204,15 @@ The meaning of some arguments and return value __depends__ on the event. The fol
 |===
 |Event | Type | Token | Return Value | Description
 |`prescan`| word! datatype!| pair!| `true`: scan + 
-`false`: drop| When a Red token has been recognized.
+`false`: ignore| When a Red token has been recognized.
 |`scan`| word! datatype!| pair!| `true`: load + 
-`false`: drop| When a Red token type has been accurately recognized.
+`false`: ignore| When a Red token type has been accurately recognized.
 |`load`| datatype!| <value>| `true`: store +
 `false`: drop| When a Red token has been converted to a Red value.
 |`open`| datatype!| pair!| `true`: open +
-`false`: drop| When a new block!, paren!, path!, map! or multiline string! is opened.
+`false`: ignore| When a new block!, paren!, path!, map! or multiline string! is opened.
 |`close`| datatype!| pair!| `true`: close + 
-`false`: drop| When a new block!, paren!, path!, map! or multiline string! is closed.
+`false`: ignore| When a new block!, paren!, path!, map! or multiline string! is closed.
 |`error`| datatype!| pair!| `true`: throw +
 `false`: ignore| When a syntax error occurs.
 |===
@@ -242,7 +242,7 @@ Notes:
 
 * If `false` is returned on a `scan` event, the corresponding `load` event will be skipped.
 
-* If an `open` event is dropped, the corresponding `close` event should also be dropped.
+* If an `open` event is ignored, the corresponding `close` event should also be ignored. Both events must return the same logical value or an error will be raised.
 
 
 See examples at https://github.com/red/code/tree/master/Scripts/lexer