errors/fmt: remove spurious newline

Change-Id: If4fbdb0e96ff085543e128702f765d789eab751a
Reviewed-on: https://go-review.googlesource.com/c/158757
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
diff --git a/errors/fmt/errors.go b/errors/fmt/errors.go
index 6be666e..f17ddb1 100644
--- a/errors/fmt/errors.go
+++ b/errors/fmt/errors.go
@@ -15,7 +15,6 @@
 // Errorf formats according to a format specifier and returns the string as a
 // value that satisfies error.
 //
-
 // The returned error includes the file and line number of the caller when
 // formatted with additional detail enabled. If the last argument is an error
 // the returned error's Format method will return it if the format string ends