#484 Add confirmation step when overriding macros with edmac

[Zbigniew Reszela]

edmac <macro> <library> may override an already exisitng macros.
We have observed that users may mistekenly type the extra string when trying the edit a macro, what leads to overriding the macro with a new one e.g.</library></macro>

edmac dynaVtune 15

creates file:

/beamlines/bl04/controls/devel/macros/15.py

with:

:::python
@macro()
def dynaVtune(self):
    self.output("Running dynaVtune...")

An extra confirmation in spock e.g.
'Do you want to create macro "dynaVtune" in file "/beamlines/bl04/controls/devel/macros/15.py" that will override the already existing macro [y]'.
could help in avoiding these mistakes.

[Carlos Falcon]

A patch has been sent to the list

[Zbigniew Reszela]

Patch sent by Carlos was applied to the develop branch.