doc: clarify tty raw mode applies to input processing only

Update the setRawMode documentation to specify that raw mode disables
special processing of input characters only. Output processing, such as
newline translation on Unix terminals, is not affected.

Fixes: #63059
Signed-off-by: zeeshan56656 <zeeshan130710@gmail.com>
PR-URL: #63438
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: zeeshan56656

doc/api/tty.md

@@ -80,10 +80,11 @@ added: v0.7.7
 Allows configuration of `tty.ReadStream` so that it operates as a raw device.
 
 When in raw mode, input is always available character-by-character, not
-including modifiers. Additionally, all special processing of characters by the
-terminal is disabled, including echoing input
+including modifiers. Additionally, all special processing of input characters
+by the terminal is disabled, including echoing input
 characters. <kbd>Ctrl</kbd>+<kbd>C</kbd> will no longer cause a `SIGINT` when
-in this mode.
+in this mode. This mode does not affect terminal output processing, such as
+newline translation on Unix terminals.
 
 ## Class: `tty.WriteStream`