From a048ffc9b01a4c6a63603edbb7204479ddebbec6 Mon Sep 17 00:00:00 2001
From: Sergey M <dstftw@gmail.com>
Date: Sun, 28 Feb 2016 03:04:06 +0600
Subject: [PATCH] [README.md] Clarify configuration file options syntax

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 7d9d501d7b..ea4ad327be 100644
--- a/README.md
+++ b/README.md
@@ -419,6 +419,8 @@ # CONFIGURATION
 -o ~/Movies/%(title)s.%(ext)s
 ```
 
+Note that options in configuration file are just the same options aka switches used in regular command line calls thus there **must be no whitespace** after `-` or `--`, e.g. `-o` or `--proxy` but not `- o` or `-- proxy`.
+
 You can use `--ignore-config` if you want to disable the configuration file for a particular youtube-dl run.
 
 ### Authentication with `.netrc` file