asterisk: use correct ranges with tr

The tr command does not take regular expressions and should not be used with ranges such as [a-z] which furthermore can cause issues if unquoted as they are interpreted by the shell.

This works fine so far. On which device/platform does it not work as expected?

It "works" but it is incorrect and unsafe. It will not work in case you happen to have a file named a single letter in the current directory for example.

added 4 commits

• c0ee0328...ef1429ad - 3 commits from branch feed:devel
• 29cdbbd6 - asterisk: use correct ranges with tr

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merged