Code errors in the "Go Language Programming" chapter "2.6.2 defer"

"Go language Programming" "2.6.2 Defer" chapter function CopyFile code is wrong, the variable dstname is not declared, according to the context is supposed to be a clerical error, the code style in the book is as follows:

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It's right to change the dstname to DST.

This article is from the "Pine" blog, be sure to keep this source http://dongsong.blog.51cto.com/916653/1588055

Code errors in the "Go Language Programming" chapter "2.6.2 defer"