I found a sentence:
I meant '\keys_set:nn'. By 'nothing', I mean 'nothing the latex people would approve'.
I'm not very clear the meaning of "by nothing", please help explain.
I found a sentence:
I meant '\keys_set:nn'. By 'nothing', I mean 'nothing the latex people would approve'.
I'm not very clear the meaning of "by nothing", please help explain.
by there means: when I use the word nothing.
This is referring back to a previous sentence where they used the word "nothing". It's clarifying what they meant when they used that word -- it meant "nothing the latex people would approve".
You can use this phrase structure any time you use a word in an ideosyncratic, unusual, or sarcastic way. You say "by X I mean Y", where X is the word and Y is the explanation.