Module names should end in _module.
They should have at least one and at most two underscores indicating
the module group name and subgroup name like
group_module or group_subgroup_module.
Contained routines are then named
group_DoThis or
group_subgroup_DoThat or
group_subgroup_SomeOperation.
Routine names should contain at least one, at most three underscores.
Thus, the name should indicate the module the routine belongs to.
Short names like Init or Output
should not be used to avoid name-space pollution
and be called group_Init or group_subgroup_Output, instead.
Ideally, all routines should have a globally uniq name even if that
not strictly necessary because modules are never used together or
some subroutines are kept private in the modules.
The use of CamelCase for the subroutine name is encouraged.
If unit-test routines for a group_module or group_subgroup_module
are collected in a separate module
this should be called
groupUT_module or group_subgroupUT_module,
respectively.