patch 7.4.918
Problem: A digit in an option name has problems.
Solution: Rename 'python3dll' to 'pythonthreedll'.
diff --git a/src/option.c b/src/option.c
index bc44cb2..6f9c5f5 100644
--- a/src/option.c
+++ b/src/option.c
@@ -2130,7 +2130,7 @@
#endif
{(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
#if defined(DYNAMIC_PYTHON3) && !defined(WIN3264)
- {"python3dll", NULL, P_STRING|P_VI_DEF|P_SECURE,
+ {"pythonthreedll", NULL, P_STRING|P_VI_DEF|P_SECURE,
(char_u *)&p_py3dll, PV_NONE,
{(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
#endif