\bind "C-Return" "newline-insert newline"
\bind "C-S-Return" "newline-insert linebreak"
\bind "C-k" "line-delete-forward"
-\bind "C-space" "space-insert protected"
+\bind "C-space" "command-alternatives space-insert protected ; math-space"
\bind "nobreakspace" "space-insert protected"
\bind "C-M-space" "space-insert normal"
\bind "S-C-space" "space-insert thin"