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Задача созд. пользователемaa13q@aa13qВладелец

Improve SPDX copyright string format

It is makes sense to simplify license header by dropping explicit Copyright prefix from a text of the SPDX-FileCopyrightText value.

For example:

from:

// SPDX-FileCopyrightText: Copyright 2020 - 2023 Open Mobile Platform LLC <community@omp.ru>

to:

// SPDX-FileCopyrightText: 2020 - 2023 Open Mobile Platform LLC <community@omp.ru>