Larry Wall released `` patch 1.3 '' on the mod.sources newsgroup in 1985 .
Late in 1984 ( according to comments in the source code ) , Larry Wall began writing a separate utility , patch ,   ? _escaped_fragment_=topic/mod.sources/ # ! searchin/mod.sources/patch/mod.sources/xSQM63e39YY/apNNJSkJi0gJ patch in mod.sources releasing `` patch 1.3 '' in May 1985 on the mod.sources newsgroup .
Diff