dev-python/ipykernel: do not alter the language field.

Previously, "python" has been replaced by "python3" in the
  "language" field of kernelspec.  That confuses client software such
  as emacs-ipython-notebook.

Package-Manager: Portage-2.3.52, Repoman-2.3.12
Signed-off-by: Benda Xu <heroxbd@gentoo.org>

dev-python/ipykernel/ipykernel-5.1.0.ebuild

@@ -35,7 +35,7 @@ python_install() {
 	distutils-r1_python_install
 
 	# bug 628222, specify python 2 or 3.
-	sed -e "s:python:${EPYTHON%.*}:" \
+	sed -e "/language/!s:python:${EPYTHON%.*}:" \
 		-i "${ED}"usr/share/jupyter/kernels/${EPYTHON%.*}/kernel.json || die
 }