mdhelp: fix tiny mistake

diff --git a/docs/markdown/before_begin.md b/docs/markdown/before_begin.md
index 121b2fce5afc2180da0f8601319868c3b553af12..7ef9b00b9819fd7b0d33b106c8e75eec693ade59 100644 (file)
--- a/docs/markdown/before_begin.md
+++ b/docs/markdown/before_begin.md
@@ -10,7 +10,7 @@ television signal and extract from it the programme stream. The tuner hardware
 is also responsible for communicating with your satellite dish via the LNB 
 in the case of DVB-S.
 
-* **Network tuners** are small (usually ([arm](https://en.wikipedia.org/wiki/ARM_architecture) based) 
+* **Network tuners** are small (usually [arm](https://en.wikipedia.org/wiki/ARM_architecture) based) 
 computers that you connect to your network via Ethernet or Wifi, they often have a large number of tuners 
 and are controlled via a web interface or software. Many work out-of-the-box with Tvheadend using SAT>IP or the HDHomeRun protocols.