<F4> fails if $EDITOR includes space

[step-]

Line 136 https://github.com/sitaramc/notes/blob/b8a2bc70faaa1d7a29742cc04ee05f3bb38af44a/tmt#L136 fails to run if EDITOR includes a space because line 4 https://github.com/sitaramc/notes/blob/b8a2bc70faaa1d7a29742cc04ee05f3bb38af44a/tmt#L4 prevents word expansion on the space character.

E.g. Here EDITOR='gvim -f' fails with message: gvim -f: no such file or directory.