diff --git a/core/print.go b/core/print.go
index c4b5fda1f..4dff98cfb 100644
--- a/core/print.go
+++ b/core/print.go
@@ -296,7 +296,7 @@ func (p *printer) expr(v Expr, outerPrec int) {
 		// This preserves the specific escaping choices that
 		// BUILD authors have made, and it also works around
 		// b/7272572.
-		if strings.HasPrefix(v.Token, `"`) {
+		if strings.HasPrefix(v.Token, `'`) {
 			s, triple, err := unquote(v.Token)
 			if s == v.Value && triple == v.TripleQuote && err == nil {
 				p.printf("%s", v.Token)
@@ -379,7 +379,7 @@ func (p *printer) expr(v Expr, outerPrec int) {
 		if v.LineBreak {
 			p.margin = p.indent()
 			if v.Op == "=" {
-				p.margin += 4
+				p.margin += 2
 			}
 		}
 
@@ -501,7 +501,7 @@ func (p *printer) seq(brack string, list []Expr, end *End, mode seqMode, forceCo
 
 	default:
 		// Multi-line form.
-		p.margin += 4
+		p.margin += 2
 		for i, x := range list {
 			// If we are about to break the line before the first
 			// element and there are trailing end-of-line comments
@@ -525,7 +525,7 @@ func (p *printer) seq(brack string, list []Expr, end *End, mode seqMode, forceCo
 			p.newline()
 			p.printf("%s", strings.TrimSpace(com.Token))
 		}
-		p.margin -= 4
+		p.margin -= 2
 		p.newline()
 	}
 	p.depth--
@@ -563,7 +563,7 @@ func (p *printer) listFor(v *ListForExpr) {
 
 	if multiLine {
 		if v.Brack != "" {
-			p.margin += 4
+			p.margin += 2
 		}
 		p.newline()
 	}
@@ -595,7 +595,7 @@ func (p *printer) listFor(v *ListForExpr) {
 			p.printf("%s", strings.TrimSpace(com.Token))
 		}
 		if v.Brack != "" {
-			p.margin -= 4
+			p.margin -= 2
 		}
 		p.newline()
 	}
diff --git a/core/quote.go b/core/quote.go
index d5ffe8d45..17559ef92 100644
--- a/core/quote.go
+++ b/core/quote.go
@@ -191,9 +191,9 @@ const hex = "0123456789abcdef"
 // quote returns the quoted form of the string value "x".
 // If triple is true, quote uses the triple-quoted form """x""".
 func quote(unquoted string, triple bool) string {
-	q := `"`
+	q := `'`
 	if triple {
-		q = `"""`
+		q = `'''`
 	}
 
 	var buf bytes.Buffer
@@ -201,10 +201,10 @@ func quote(unquoted string, triple bool) string {
 
 	for i := 0; i < len(unquoted); i++ {
 		c := unquoted[i]
-		if c == '"' && triple && (i+1 < len(unquoted) && unquoted[i+1] != '"' || i+2 < len(unquoted) && unquoted[i+2] != '"') {
+		if c == '\'' && triple && (i+1 < len(unquoted) && unquoted[i+1] != '\'' || i+2 < len(unquoted) && unquoted[i+2] != '\'') {
 			// Can pass up to two quotes through, because they are followed by a non-quote byte.
 			buf.WriteByte(c)
-			if i+1 < len(unquoted) && unquoted[i+1] == '"' {
+			if i+1 < len(unquoted) && unquoted[i+1] == '\'' {
 				buf.WriteByte(c)
 				i++
 			}
@@ -215,8 +215,8 @@ func quote(unquoted string, triple bool) string {
 			buf.WriteByte(c)
 			continue
 		}
-		if c == '\'' {
-			// Can allow ' since we always use ".
+		if c == '"' {
+			// Can allow " since we always use '.
 			buf.WriteByte(c)
 			continue
 		}