patch 9.1.0932: new Italian tutor not installed

Problem:  new Italian tutor not installed
Solution: add Makefile rule, include it into the Filelist
          ("Philip H." <47042125+pheiduck@users.noreply.github.com>),
          update the tutors help file

closes: #16215

Co-authored-by: Philip H. <47042125+pheiduck@users.noreply.github.com>
Signed-off-by: Philip H. <47042125+pheiduck@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/pi_tutor.txt b/runtime/doc/pi_tutor.txt
index 618fe74..f4f86e8 100644
--- a/runtime/doc/pi_tutor.txt
+++ b/runtime/doc/pi_tutor.txt
@@ -1,4 +1,4 @@
-*pi_tutor.txt*    For Vim version 9.1.  Last change: 2024 Nov 09
+*pi_tutor.txt*    For Vim version 9.1.  Last change: 2024 Dec 16
 
 INTERACTIVE TUTORIALS FOR VIM			 *vim-tutor-mode*
 
@@ -16,21 +16,28 @@
 1.1 Commands
 ------------
 								      *:Tutor*
-:Tutor {tutorial}	Opens a tutorial.  Command-line completion for
-			{tutorial} is provided, the candidates are a list of
-			'.tutor' files found in the 'tutor/'  folder in
-			the 'runtimepath'.  Tutorials prefixed with 'vim-'
+:Tutor [tutorial]	Opens a tutorial.  Command-line completion for
+			[tutorial] is provided, the candidates are a list of
+			".tutor" files found in the "tutor/<lang>/"  folder in
+			the 'runtimepath'.  Tutorials prefixed with "vim-"
 			will always be shown first.
 
-			If no {tutorial} is provided, the command starts the
-			'vim-01-beginner' tutorial, which is equivalent to
-			Vim's `vimtutor`.
+			If no [tutorial] is provided, the command starts the
+			"vim-01-beginner" tutorial, which is equivalent to
+			Vim's `vimtutor`, chapter 1.
 
+			Uses the translated tutorial for the current message
+			language if possible (|v:lang|), e.g. to open the
+			chapter 1 of the Italian tutor, use: >
+
+			:lang it_IT.utf-8
+			:Tutor
+<
 =============================================================================
 2. Creating tutorials                                        *vim-tutor-create*
 
 Writing vim-tutor-mode tutorials is easy.  For an overview of the format used,
-please consult the 'tutor.tutor' file: >
+please consult the "tutor.tutor" file: >
 
     :Tutor tutor
 <
diff --git a/runtime/doc/usr_01.txt b/runtime/doc/usr_01.txt
index 8a513e8..70a3f9b 100644
--- a/runtime/doc/usr_01.txt
+++ b/runtime/doc/usr_01.txt
@@ -1,4 +1,4 @@
-*usr_01.txt*	For Vim version 9.1.  Last change: 2024 Nov 03
+*usr_01.txt*	For Vim version 9.1.  Last change: 2024 Dec 16
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -110,8 +110,8 @@
 For the interactive tutor, see |vim-tutor-mode|
 
 Instead of reading the text (boring!) you can use the vimtutor to learn your
-first Vim commands.  This is a 30-minute tutorial that teaches the most basic
-Vim functionality hands-on.
+first Vim commands.  This is a 30-minute tutorial provided in 2 chapters, that
+teaches the most basic Vim functionality hands-on.
 
 On Unix, if Vim has been properly installed, you can start it from the shell:
 >