Update tutorial for new "Copy" button (#135007)

Co-authored-by: Sergey B Kirpichev <[email protected]>

Author: StanFromIreland

Doc/tutorial/introduction.rst

@@ -13,10 +13,9 @@ end a multi-line command.
 
 .. only:: html
 
-   You can toggle the display of prompts and output by clicking on ``>>>``
-   in the upper-right corner of an example box.  If you hide the prompts
-   and output for an example, then you can easily copy and paste the input
-   lines into your interpreter.
+   You can use the "Copy" button (it appears in the upper-right corner
+   when hovering over or tapping a code example), which strips prompts
+   and omits output, to copy and paste the input lines into your interpreter.
 
 .. index:: single: # (hash); comment