[dev.power64] code review 160200044: build: merge default into dev.power64

src/cmd/yacc/testdata/expr/expr.y

 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // This is an example of a goyacc program.
 // To build it:
 // go tool yacc -p "expr" expr.y (produces y.go)
 // go build -o expr y.go
 // expr
 // > <type an expression>
@@ skipping 180 matching lines @@
                 if err == io.EOF {
                         return
                 }
                 if err != nil {
                         log.Fatalf("ReadBytes: %s", err)
                 }
 
                 exprParse(&exprLex{line: line})
         }
 }