webcommands: move nonempty logic from JavaScript to Python This avoids hard-coding the '(none)' string in the JavaScript for each style and avoids the {nonexisting|nonempty} hack which only works since the template system don't complain about undefined variables.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg ci -Ama -d '1000000000 0'
echo b > b
hg branch b
hg ci -Amb -d '1000000000 0'
hg co -C 0

echo fast-forward
hg merge b
hg ci -Ammerge -d '1000000000 0'

echo bogus fast-forward should fail
hg merge b

echo done