over 1 year
Double click on a word, it is highlighted, selected, and copied to clipboard.
about 1 year
It already works that way. Highlight text in any X application makes it available in your primary selection buffer. You can paste it by middle-clicking. This is consistent across the entire system and is exactly how it should work. If you want to overwrite your clipboard selection buffer, it requires manually copying the selection with ctrl-shift-C.
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