Tribler/tribler — pull request #1109 by RunningDroid (2015-01-01 07:49:34+00:00)
Title: Remove unnecessary grep in SingleInstanceChecker.py

pgrep removes itself from the list of results and with grep 2.21 or greater grep will print `grep: warning: GREP_OPTIONS is deprecated; please use an alias or script` if GREP_OPTIONS is set, causing Tribler to believe there is already a process running.