test/bench/go1: fix typo in parserdata_test.go comment

Change-Id: Iaca02660bdc8262db2b003a94aca661b5cec5576
Reviewed-on: https://go-review.googlesource.com/38437Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

test/bench/go1/parserdata_test.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // Input for parser benchmark.
-// This was generated by starting with a the contents of
+// This was generated by starting with the contents of
 // src/pkg/go/parser/parser.go at rev 9b455eb64690, then
 // compressing with bzip2 -9, then encoding to base64.
 // We compile the data into the binary so that the benchmark is