Prefix Writer
Implements simple writer, that will prefix each incoming line. It's guaranteed, that prefix will be prepended only once per each line, no matter how many calls to Write is done for writing that line.
Behavior
New Returns Writer With Prefix
Writer Write Nothing At Empty Data
Writer Write First Byte With Prefix
Writer Not Inserts Prefix On Two Writes Without Newline
Writer Adds Prefix On Each New Line
Writer Inserts Prefix When Newline Comes First
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Documentation
See reference at godoc.org.