patch 7.4.1395
Problem:    Using DETACH in quotes is not compatible with the Netbeans
            interface. (Xavier de Gaye)
Solution:   Remove the quotes, only use them for JSON and JS mode.
diff --git a/src/netbeans.c b/src/netbeans.c
index 55169ea..05142a8 100644
--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -461,7 +461,7 @@
 	/* NOTREACHED */
     }
 
-    if (STRCMP(cmd, "\"DETACH\"") == 0)
+    if (STRCMP(cmd, "DETACH") == 0)
     {
 	buf_T	*buf;