Trouble setting Sublime Text as default editor for entering Git commit message

I am learning git command-line. I wish to set Sublime Text as the default editor for entering commit message, when I run the git commit command from Terminal. But when trying to do so, I am running into the following error: > error: There was a problem with the editor ''/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl' -n -w'. Please supply the message using either -m or -F option. What could be going wrong? How do I resolve the error message, and set things such that Sublime Text opens automatically for entering commit message when running git commit command from Terminal.