From copy-paste + -o, on the model of typo (“typographical error”).
copy-pasto (plural copy-pastos)
- (computing, slang) An error caused by incorrect copy-pasting, often resulting in unintended text (or other content) being inserted.
- Coordinate terms: clicko, scanno, speako, spello, thinko, typo, writo
2010 May 27, Jung-uk Kim, “Re: Timezone behavior of Java”, in mailing.freebsd.java[1] (Usenet):Sorry, copy-pasto. This line was moved few lines up to here by my evil mouse. :-(
2014 January 6, Kent R. Spillner, “Re: new login style: yubikey-and-pwd”, in fa.openbsd.tech[2] (Usenet):Haven't tested your latest diff, but I think you have a copy-pasto here (", cnt").