I was attempting to resolve an issue I was having with the rmagick gem using the 2nd answer on this: Bundle can't install RMagick gem on Mac OSX 10.7
However, when I typed in the command C_INCLUDE_PATH= I accidentally started it with two slashes like so: C_INCLUDE_PATH=//usr...
I'd like to remove/undo this command but I'm not sure how. Help?
Info: on OSX 10.9 Mavericks