/usr/share/kdevcodegen/templates/arguments_names.txt is in kdevelop-data 4:5.2.1-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | {% for argument in arguments %}{{ argument.name }}{% if not forloop.last %}, {% endif %}{% endfor %}
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