The final code block then reformats the assignment lines, by iterating through the original buffer line Numbers (linenum) and through each line in the lines list, in parallel.
最后的代码块同时遍历原来的缓存行号(linenum)和行列表中的每个行，以重新格式化赋值行。
The output of each program is then pasted back into the buffer, replacing the original contents.
然后将每个程序的输出粘贴回缓冲区，替换原有的内容。
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