From fb0d9acf36df408883930026073304bca1cce0dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mark=20C=C3=B4t=C3=A9?= <mcote@alumni.uwaterloo.ca>
Date: Sun, 5 Jun 2016 14:41:42 -0400
Subject: [PATCH] Add missing space before parenthesis.

---
 src/doc/book/functions.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/doc/book/functions.md b/src/doc/book/functions.md
index 574929c14b35d..b040684d05f7e 100644
--- a/src/doc/book/functions.md
+++ b/src/doc/book/functions.md
@@ -249,7 +249,7 @@ stack backtrace:
 If you need to override an already set `RUST_BACKTRACE`, 
 in cases when you cannot just unset the variable, 
 then set it to `0` to avoid getting a backtrace. 
-Any other value(even no value at all) turns on backtrace.
+Any other value (even no value at all) turns on backtrace.
 
 ```text
 $ export RUST_BACKTRACE=1