io: clarify SeekEnd offset value

fxies golang#53474
jproberts · Jun 24, 2022 · 46f93cf · 46f93cf
1 parent 111cdb5
commit 46f93cf
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/io/io.go b/src/io/io.go
@@ -111,7 +111,8 @@ type Closer interface {
 // interpreted according to whence:
 // SeekStart means relative to the start of the file,
 // SeekCurrent means relative to the current offset, and
-// SeekEnd means relative to the end.
+// SeekEnd means relative to the end
+// (for example, offset = -2 specifies the penultimate byte of the file).
 // Seek returns the new offset relative to the start of the
 // file or an error, if any.
 //