patch 8.2.3197: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move a few more error messages to errors.h.
diff --git a/src/edit.c b/src/edit.c
index 5280a82..96464de 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -165,7 +165,7 @@
     // Don't allow inserting in the sandbox.
     if (sandbox != 0)
     {
-	emsg(_(e_sandbox));
+	emsg(_(e_not_allowed_in_sandbox));
 	return FALSE;
     }
 #endif