looking for latest, greatest BBB kernel source, and patch.sh question

what is considered the latest, greatest kernel source tree for
building for the BBB? currently, i used openembedded and the
meta-beagleboard layer, which uses mainline kernel 3.8 and applies a
bazillion patches. which works, but i'd like to work with something
more current.

  i'm looking at the beagleboard kernel source at github, the 3.11
branch:

https://github.com/beagleboard/kernel/blob/3.11/patch.sh

which looks promising, but there's something strange about that
script, if you look at line 107:

... snip ...
  echo 'SRC_URI += " \' >> ${EXPORTPATH}-oe/recipes-kernel/linux/${RECIPENAME}
fi

if [ -f ${DIR}/patch_script.sh ] ; then
... snip ...

  according to the colour coding, that escaped single quote above
starts sucking up a number of lines after that. shouldn't there be an
escaped backslash there? or am i misreading something?

  in any event, what would be considered the cutting edge kernel
source for the BBB? thanks.

rday