wligtenberg/ggplot2 — comment on commit 471885146b26321e93b345259f28a277eaf8c91d
File:  line 0
By wch:

If you go with this, it's probably a good idea to check if removing `space_is_free` and changing `space` from a string to a list will break any of the other facet code. Also, `space` isn't very descriptive, so maybe calling it `spacefree` would be better?