Kevin O'Connor 0cfab84e1a gcode: Return previous handler from register_command(cmd, None)
When overriding a g-code command, allow the caller to obtain the
previous command handler.  Use this feature in homing_override and
safe_z_home.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2020-02-12 20:19:18 -05:00
..
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