Add IAL test and fix doc

ial.go

@@ -18,7 +18,7 @@ func newInlineAttr() *inlineAttr {
 	return &inlineAttr{class: make(map[string]bool), attr: make(map[string]string)}
 }
 
-// Parsing and thus detecting an IAL. Return a valid *IAL or nil.
+// Parsing and thus detecting an IAL.
 // IAL can have #id, .class or key=value element seperated by spaces, that may be escaped
 func (p *parser) isInlineAttr(data []byte) int {
 	esc := false

ial_test.go

@@ -0,0 +1,15 @@
+package mmark
+
+import "testing"
+
+func TestIALSyntax(t *testing.T) {
+	tests := []string{
+		"{.class key=\"value\"}\n> Quote\n",
+		"<blockquote class=\"class\" key=\"value\">\n<p>Quote</p>\n</blockquote>\n",
+
+		"{.class key=\"va\\}lue\"}\n> Quote\n",
+		"<blockquote class=\"class\" key=\"va\\}lue\">\n<p>Quote</p>\n</blockquote>\n",
+	}
+
+	doTestsBlock(t, tests, 0)
+}