# File lib/rake.rb, line 78 78: def ext(newext='') 79: return self.dup if ['.', '..'].include? self 80: if newext != '' 81: newext = (newext =~ /^\./) ? newext : ("." + newext) 82: end 83: dup.sub!(%r(([^/\\])\.[^./\\]*$)) { $1 + newext } || self + newext 84: end