Properly handle repeated quotes.

config.go

@@ -70,13 +70,19 @@ func parseVal(rawVal string) (*string, error) {
 		val = val[:groups[2*2]]
 	}
 
-	// Remove all '"', and replace '\"' with '"'
-	nonEscapedQuotes := regexp.MustCompile(`[^\\]"`)
-	val = nonEscapedQuotes.ReplaceAllStringFunc(val, func(s string) string { return s[:len(s)-1] })
-	if val[0] == '"' {
-		val = val[1:]
+	var sb strings.Builder
+	for i, r := range val {
+		if r == '"' {
+			continue
+		}
+
+		if val[i] == '\\' && val[i+1] == '"' {
+			sb.WriteRune('"')
+		} else {
+			sb.WriteRune(r)
+		}
 	}
-	val = strings.ReplaceAll(val, `\"`, `"`)
+	val = sb.String()
 
 	return &val, nil
 }

config_test.go

@@ -438,3 +438,27 @@ Could not parse config correctly with quotes inside correctly.
 	got:      %#v`, want, config)
 	}
 }
+
+func TestTwoQuote(t *testing.T) {
+	type Config struct {
+		Foo string
+	}
+
+	config := Config{
+		Foo: "",
+	}
+	err := LoadConfig("test_configs/twoquotes.cfg", &config)
+	if err != nil {
+		t.Fatalf("Could not parse config with escaped quote: %s", err.Error())
+	}
+
+	want := Config{
+		Foo: "testing",
+	}
+	if want != config {
+		t.Fatalf(`
+Could not parse config correctly with quotes inside correctly.
+	expected: %#v
+	got:      %#v`, want, config)
+	}
+}

test_configs/twoquotes.cfg

@@ -0,0 +1 @@
+Foo = test""ing