patch 8.0.1451: difficult to set the python home directories properly
Problem: It is difficult to set the python home directory properly for
Python 2.7 and 3.5 since both use $PYTHONHOME.
Solution: Add the 'pythonhome' and 'pythonthreehome' options. (Kazuki
Sakamoto, closes #1266)
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index 06ae663..516a1da 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -839,7 +839,9 @@
'prompt' 'prompt' enable prompt in Ex mode
'pumheight' 'ph' maximum height of the popup menu
'pythondll' name of the Python 2 dynamic library
+'pythonhome' name of the Python 2 home directory
'pythonthreedll' name of the Python 3 dynamic library
+'pythonthreehome' name of the Python 3 home directory
'pyxversion' 'pyx' Python version used for pyx* commands
'quoteescape' 'qe' escape characters used in a string
'readonly' 'ro' disallow writing the buffer