all: fix a few more printf arg bugs found by go vet

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7413045

src/pkg/math/big/rat_test.go

@@ -753,7 +753,7 @@ func TestFloat64SpecialCases(t *testing.T) {
 
 		// 4. Check exactness using slow algorithm.
 		if wasExact := new(Rat).SetFloat64(f).Cmp(r) == 0; wasExact != exact {
-			t.Errorf("Rat.SetString(%q).Float64().exact = %b, want %b", input, exact, wasExact)
+			t.Errorf("Rat.SetString(%q).Float64().exact = %t, want %t", input, exact, wasExact)
 		}
 	}
 }

src/pkg/reflect/set_test.go

@@ -81,7 +81,7 @@ func TestImplicitMapConversion(t *testing.T) {
 			t.Errorf("#5 after SetMapIndex(b1, b2): %p (!= %p), %t (map=%v)", x, b2, ok, m)
 		}
 		if p := mv.MapIndex(ValueOf(b1)).Elem().Pointer(); p != uintptr(unsafe.Pointer(b2)) {
-			t.Errorf("#5 MapIndex(b1) = %p want %p", p, b2)
+			t.Errorf("#5 MapIndex(b1) = %#x want %p", p, b2)
 		}
 	}
 	{
@@ -96,7 +96,7 @@ func TestImplicitMapConversion(t *testing.T) {
 			t.Errorf("#6 after SetMapIndex(c1, c2): %p (!= %p), %t (map=%v)", x, c2, ok, m)
 		}
 		if p := mv.MapIndex(ValueOf(c1)).Pointer(); p != ValueOf(c2).Pointer() {
-			t.Errorf("#6 MapIndex(c1) = %p want %p", p, c2)
+			t.Errorf("#6 MapIndex(c1) = %#x want %p", p, c2)
 		}
 	}
 	{
@@ -115,7 +115,7 @@ func TestImplicitMapConversion(t *testing.T) {
 			t.Errorf("#7 after SetMapIndex(b1, b2): %p (!= %p), %t (map=%v)", x, b2, ok, m)
 		}
 		if p := mv.MapIndex(ValueOf(b1)).Pointer(); p != uintptr(unsafe.Pointer(b2)) {
-			t.Errorf("#7 MapIndex(b1) = %p want %p", p, b2)
+			t.Errorf("#7 MapIndex(b1) = %#x want %p", p, b2)
 		}
 	}
 

src/pkg/strings/strings_test.go

@@ -967,7 +967,7 @@ var ContainsRuneTests = []struct {
 func TestContainsRune(t *testing.T) {
 	for _, ct := range ContainsRuneTests {
 		if ContainsRune(ct.str, ct.r) != ct.expected {
-			t.Errorf("ContainsRune(%s, %s) = %v, want %v",
+			t.Errorf("ContainsRune(%q, %q) = %v, want %v",
 				ct.str, ct.r, !ct.expected, ct.expected)
 		}
 	}