patch 8.0.0251: not easy to select Python 2 or 3
Problem: It is not so easy to write a script that works with both Python 2
and Python 3, even when the Python code works with both.
Solution: Add 'pyxversion', :pyx, etc. (Marc Weber, Ken Takata)
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index 4ebf999..81b2eb6 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1440,6 +1440,10 @@
|:python| :py[thon] execute Python command
|:pydo| :pyd[o] execute Python command for each line
|:pyfile| :pyf[ile] execute Python script file
+|:pyx| :pyx execute |python_x| command
+|:pythonx| :pythonx same as :pyx
+|:pyxdo| :pyxd[o] execute |python_x| command for each line
+|:pyxfile| :pyxf[ile] execute |python_x| script file
|:quit| :q[uit] quit current window (when one window quit Vim)
|:quitall| :quita[ll] quit Vim
|:qall| :qa[ll] quit Vim