minor doc fixes

Documentation/notes.md

@@ -129,7 +129,7 @@ Notes
 
 Testing:
 
-(from [SO](https://stackoverflow.com/questions/52187/virtual-serial-port-for-linux)
+(from [SO](https://stackoverflow.com/questions/52187/virtual-serial-port-for-linux))
 
 ```
 socat -d -d pty,raw,echo=0,link=/tmp/ttyTEST0 pty,raw,echo=0,link=/tmp/ttyTEST1