Pedantically reword the section about relative imports and main modules.
from .. import formats
from ..filters import equalizer
-Note that relative imports are based on the name of the current module. Since
-the name of the main module is always ``"__main__"``, modules intended for use
+Note that relative imports are based on the name of the current module's package.
+Since the main module does not have a package, modules intended for use
as the main module of a Python application must always use absolute imports.