理想情况下，要重新格式化每一行，AlignAssignments将使用内置的substitute函数，并使用经过printf重新整理后的文本替换运算符之前的所有内容。

Ideally, in order to reformat each line, AlignAssignments would use the built-in substitute function, and replace everything up to the operator with a printf'd rearrangement of that text.

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