Tweak readme export reminder phrasing

Author: pimterry

README.md

@@ -77,7 +77,7 @@ curl -L https://rawgit.com/pimterry/notes/latest-release/install.sh | bash -s --
 
 By default your notes live in ~/notes, but you can change that to anywhere you like by setting the `$NOTES_DIRECTORY` environmental variable. See [how do I configure this?](#how-do-i-configure-this) for more details.
 
-To get started with you'll want to set `$EDITOR` to your favourite text editor, and probably `$NOTES_DIRECTORY` to the directory in which you'd like to use to store your notes (this defaults to `~/notes`). You'll typically want to set these as environment variables in your `.bashrc`, `.zshrc`, or similar. Remember to use `export` command when setting environment variables in command line.
+To get started with you'll want to set `$EDITOR` to your favourite text editor, and probably `$NOTES_DIRECTORY` to the directory in which you'd like to use to store your notes (this defaults to `~/notes`). You'll typically want to set these as environment variables in your `.bashrc`, `.zshrc`, or similar. Remember to use `export` command when setting environment variables on the command line in Linux.
 
 There are also more complex options available. You can set any configuration properties either in the environment, or in a config file (stored in `~/.config/notes/config`), with settings in config overriding those in your environment. This allows you to configure a different `$EDITOR` for notes to everything else, if you like. The config file is a good choice for more complex set ups, but probably not worth worrying about to start with. We've included an example config in this repo for you ([config](config)) that you can copy if you like.