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by ahoge 4515 days ago
It kinda made sense, because there wasn't anything fancy like Notepad. If you wanted to read some section, you had to specify the range. If you wanted to change a line, you overwrote it by using the same line number. If you wanted to insert a line, you had to pick a line number which lies between those other two line numbers. That's why you used an increment of 10 (or whatever) instead of 1.