Add explanations to some lines
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@ -9,8 +9,8 @@ for file in argv[1:]:
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(
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(
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''.join(ch for ch in file
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''.join(ch for ch in file
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if ch.isalnum()
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if ch.isalnum()
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or ch is ' '
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or ch is ' ' # whitespaces will be replaced
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or ch is '.'
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or ch is '.' # dots are ok
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or ch is '_' # do not ruin previous work
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or ch is '_' # do not ruin previous work
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or ch is '-') # dashes are ok
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or ch is '-') # dashes are ok
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)
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)
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