Code Style - not really good list manipulation example - needs explanation

In the Code Style chapter examples - Short Ways to Manipulate Lists there is an example "Add three to all list members."

"bad"

for i in range(len(a)):
    a[i] += 3

"good"

a = [i + 3 for i in a]

Unfortunately the "bad" and "good" examples do a different things:

• "bad" modifies the original list in place
• "good" creates a new modified list and does not change the original object - not exactly "Add three to all list members."

Although the "good" code looks cleaner the result could be unwanted for example in case of huge lists or required side-effect of modifying the original list. The code at least needs an explanation.

writing/style.html の Code Style 章を開き、“Short Ways to Manipulate Lists” セクションを読んでください。2 つのリスト例を比較し、in-place で変更する場合と新しいリストを作成する場合の挙動の違いが明確になるよう、周囲の説明を更新してください。各例が元のリストを変更するのはいつなのかを読者が理解できれば完了です。