Added a space before stdout redirection at browserstack-local call. #14
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Normally when we pass to the start function parameters as for example '-parallel-runs', the function add_args append it to the string $call. Before execute the call the stderr to stdout redirection is appended to the string ( see line 121 in Local.php ).
If some custom parameters are passed to the start method, the value of the last custom parameter is sticked with the string "2>&1" in $call variable and this cause an exception.
Adding a space avoid this exception in this case.