oh-my-bash.sh : Fix for #70 #59 (#71)

* oh-my-bash.sh : Fix for #70

* Future proofing

* Fixed symlink for agnoster-bash.theme.sh

* Reaction on https://github.com/ohmybash/oh-my-bash/pull/71#discussion_r307617303

oh-my-bash.sh

@@ -159,5 +159,5 @@ if ! type_exists '__git_ps1' ; then
 fi
 
 # Adding Support for other OSes
-[ -s /usr/bin/gloobus-preview ] && PREVIEW="gloobus-preview" || 
+[ -s /usr/bin/gloobus-preview ] && PREVIEW="gloobus-preview" ||
 [ -s /Applications/Preview.app ] && PREVIEW="/Applications/Preview.app" || PREVIEW="less"

themes/agnoster/agnoster-bash.theme.sh

-agnoster.bash
\ No newline at end of file