runtime(tutor): update the tutor files and re-number the chapters

closes: #16110

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/tutor/README.txt b/runtime/tutor/README.txt
index 060268e..a8b48a4 100644
--- a/runtime/tutor/README.txt
+++ b/runtime/tutor/README.txt
@@ -4,12 +4,12 @@
 is that you can do a simple editing task using the Vim editor.
 
 Tutor is a file that contains the tutorial lessons. You can simply
-execute "vim tutor" and then follow the instructions in the lessons.
+execute "vim tutor1" and then follow the instructions in the lessons.
 The lessons tell you to modify the file, so DON'T DO THIS ON YOUR
 ORIGINAL COPY.
 
-On Unix you can also use the "vimtutor" program.  It will make a
-scratch copy of the tutor first.
+On UNIX-like systems you can also use the "vimtutor" program.
+It will make a scratch copy of the tutor first.
 
 I have considered adding more advanced lessons but have not found the
 time. Please let me know how you like it and send any improvements you
@@ -19,19 +19,26 @@
 (303) 273-3987
 bware@mines.colorado.edu bware@slate.mines.colorado.edu bware@mines.bitnet
 
+All of the above regarding chapter one of the tutorial also applies to chapter
+two of the tutorial.  Except that you must use the command “vim tutor2” to open
+chapter two.
+
+The chapter two of the tutorial was written by Paul D. Parker.
 
 Translation
 -----------
-
-The tutor.xx and tutor.xx.utf-8 files are translated files (where xx is the
-language code).  The encoding of tutor.xx might be latin1 or other traditional
+The files tutor1.xx and tutor1.xx.utf-8 for chapter one and tutor2.xx and
+tutor2.xx.utf-8 for chapter two of the tutorial are translated files (where xx
+is the language code).
+The encoding of tutor1.xx or tutor2.xx might be latin1 or other traditional
 encoding.  If you don't need a translation with such traditional encoding,
-you just need to prepare the tutor.xx.utf-8 file.
-If you need another encoding, you can also prepare a file named tutor.xx.enc
-(replace enc with the actual encoding name).  You might also need to adjust the
-tutor.vim file.
-The "make" command can be used for creating tutor.xx from tutor.xx.utf-8.
-See the Makefile for detail.  (For some languages, tutor.xx.utf-8 is created
-from tutor.xx for historical reasons.)
+you just need to prepare the tutor1.xx.utf-8 or tutor2.xx.utf-8 file.
+If you need another encoding, you can also prepare a file named tutor1.xx.enc or
+tutor2.xx.enc (replace enc with the actual encoding name).  You might also need
+to adjust the tutor.vim file.
+The "make" command can be used for creating tutor1.xx or tutor2.xx from
+tutor.xx.utf-8 or tutor2.xx.utf-8, respectively.
+See the Makefile for detail.  (For some languages, tutor1.xx.utf-8 is created
+from tutor1.xx for historical reasons.)
 
 [This file was modified for Vim by Bram Moolenaar et al.]