Documentation/config.txt: a variable can be defined on the section header line

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 6857d2f..c6f09f8 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -49,7 +49,8 @@
 In this syntax, subsection names follow the same restrictions as for section
 names.
 
-All the other lines are recognized as setting variables, in the form
+All the other lines (and the remainder of the line after the section
+header) are recognized as setting variables, in the form
 'name = value'.  If there is no equal sign on the line, the entire line
 is taken as 'name' and the variable is recognized as boolean "true".
 The variable names are case-insensitive and only alphanumeric