pprof: fix tests on Windows

Skip TestSymbolizationPath (seems too Unix-specific).
Fix others with golden output to adjust for Windows file name syntax.

internal/driver/driver_test.go

 	"io/ioutil"
 	"os"
 	"regexp"
+	"runtime"
 	"strconv"
 	"strings"
 	"testing"
 			t.Errorf("reading solution file %s: %v", solution, err)
 			continue
 		}
+		if runtime.GOOS == "windows" {
+			sbuf = bytes.Replace(sbuf, []byte("testdata/"), []byte("testdata\\"), -1)
+			sbuf = bytes.Replace(sbuf, []byte("/path/to/"), []byte("\\path\\to\\"), -1)
+		}
 
 		if flags[0] == "svg" {
 			b = removeScripts(b)

internal/driver/fetch_test.go

 	"path/filepath"
 	"reflect"
 	"regexp"
+	"runtime"
 	"testing"
 	"time"
 
 )
 
 func TestSymbolizationPath(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("test assumes Unix paths")
+	}
+
 	// Save environment variables to restore after test
 	saveHome := os.Getenv("HOME")
 	savePath := os.Getenv("PPROF_BINARY_PATH")

internal/proftest/proftest.go

 		// Ignore that failure as long as we get output.
 		err = nil
 	}
+	if err != nil {
+		data = []byte(fmt.Sprintf("diff failed: %v\nb1: %q\nb2: %q\n", err, b1, b2))
+		err = nil
+	}
 	return
 }
 

internal/report/report_test.go

 	"bytes"
 	"io/ioutil"
 	"regexp"
+	"runtime"
 	"testing"
 
 	"github.com/google/pprof/internal/binutils"
 		if err != nil {
 			t.Fatalf("%s: %v", tc.want, err)
 		}
+		if runtime.GOOS == "windows" {
+			gold = bytes.Replace(gold, []byte("testdata/"), []byte("testdata\\"), -1)
+		}
 		if string(b.String()) != string(gold) {
 			d, err := proftest.Diff(gold, b.Bytes())
 			if err != nil {