- replaced gofmt expression formatting algorithm with

rsc's algorithm
- applied gofmt -w misc src
- partial CL (last chunk)

R=rsc, r
http://go/go-review/1024041

src/pkg/testing/testing.go

@@ -32,7 +32,7 @@ func tabify(s string) string {
 	}
 	for i := 0; i < n-1; i++ {	// -1 to avoid final newline
 		if s[i] == '\n' {
-			return s[0 : i+1]+"\t"+tabify(s[i+1 : n])
+			return s[0:i+1] + "\t" + tabify(s[i+1:n])
 		}
 	}
 	return s;
@@ -62,12 +62,12 @@ func (t *T) FailNow() {
 
 // Log formats its arguments using default formatting, analogous to Print(),
 // and records the text in the error log.
-func (t *T) Log(args ...)	{ t.errors += "\t"+tabify(fmt.Sprintln(args)) }
+func (t *T) Log(args ...)	{ t.errors += "\t" + tabify(fmt.Sprintln(args)) }
 
 // Log formats its arguments according to the format, analogous to Printf(),
 // and records the text in the error log.
 func (t *T) Logf(format string, args ...) {
-	t.errors += "\t"+tabify(fmt.Sprintf(format, args))
+	t.errors += "\t" + tabify(fmt.Sprintf(format, args))
 }
 
 // Error is equivalent to Log() followed by Fail().