patch 8.2.4005: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more error messages to errors.h.
diff --git a/src/if_python.c b/src/if_python.c
index 7cc9aa7..63e9068 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -1024,7 +1024,7 @@
 #ifndef PY_CAN_RECURSE
     if (recursive)
     {
-	emsg(_("E659: Cannot invoke Python recursively"));
+	emsg(_(e_cannot_invoke_python_recursively));
 	return;
     }
     ++recursive;