Implement SkipStyle, add test

Fix a bug in findHtmlTagPos introduced with e02c392d.

html.go

@@ -884,7 +884,7 @@ func findHtmlTagPos(tag []byte, tagname string) (bool, int) {
 	}
 
 	rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
-	if rightAngle > i {
+	if rightAngle >= i {
 		return true, rightAngle
 	}
 
@@ -1133,6 +1133,9 @@ func (r *HTML) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
 			r.out(w, tag("/del", nil, false))
 		}
 	case HTMLSpan:
+		if r.flags&SkipStyle != 0 && isHtmlTag(node.Literal, "style") {
+			break
+		}
 		//if options.safe {
 		//	out(w, "<!-- raw HTML omitted -->")
 		//} else {

inline_test.go

@@ -1139,6 +1139,15 @@ func TestSkipImages(t *testing.T) {
 	})
 }
 
+func TestSkipStyle(t *testing.T) {
+	doTestsInlineParam(t, []string{
+		"foo\n\n<style>color: #f00</style> bar",
+		"<p>foo</p>\n\n<p>color: #f00 bar</p>\n",
+	}, TestParams{
+		HTMLFlags: SkipStyle,
+	})
+}
+
 func TestUseXHTML(t *testing.T) {
 	doTestsParam(t, []string{
 		"---",