[gnu] externals/fontaine updated (b5700d017b -> 5b15c473c3)

[ELPA Syncer]

elpasync pushed a change to branch externals/fontaine.

      from  b5700d017b Update the copyright years
       new  f3a8596f15 Make :line-spacing accept the Emacs 31 cons value of 
line-spacing
       new  5b15c473c3 Make sure :line-spacing can also take a nil value


Summary of changes:
 fontaine.el | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)