add double quotes around $request

conf/nginx.conf

diff --git a/conf/nginx.conf b/conf/nginx.conf
index 315245d..7fac1e6 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -18,7 +18,7 @@
     include       mime.types;
     default_type  application/octet-stream;
 
-    #log_format  main  '$remote_addr - $remote_user [$time_local] $request '
+    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
     #                  '"$status" $body_bytes_sent "$http_referer" '
     #                  '"$http_user_agent" "$http_x_forwarded_for"';