block: rm extra new line after raw blocks

match reference implementation

src/block.rs

@@ -353,7 +353,7 @@ impl<'s> TreeParser<'s> {
         span_end: Range<usize>,
         mut lines: &mut [Range<usize>],
     ) {
-        if let Kind::Fenced { indent, .. } = k {
+        if let Kind::Fenced { indent, spec, .. } = k {
             for line in lines.iter_mut() {
                 let indent_line = self.src.as_bytes()[line.clone()]
                     .iter()
@@ -361,6 +361,14 @@ impl<'s> TreeParser<'s> {
                     .count();
                 line.start += (*indent).min(indent_line);
             }
+
+            // trim ending whitespace of raw block
+            if spec.starts_with('=') {
+                let l = lines.len();
+                if l > 0 {
+                    lines[l - 1] = self.trim_end(lines[l - 1].clone());
+                }
+            }
         } else {
             // trim starting whitespace of each inline
             for line in lines.iter_mut() {

src/lib.rs

@@ -1534,7 +1534,39 @@ mod test {
         test_parse!(
             "``` =html\n<table>\n```",
             Start(RawBlock { format: "html" }, Attributes::new()),
-            Str("<table>\n".into()),
+            Str("<table>".into()),
+            End(RawBlock { format: "html" }),
+        );
+    }
+
+    #[test]
+    fn raw_block_whitespace() {
+        test_parse!(
+            concat!(
+                "```=html\n",  //
+                "<tag1>\n",    //
+                "<tag2>\n",    //
+                "```\n",       //
+                "\n",          //
+                "paragraph\n", //
+                "\n",          //
+                "```=html\n",  //
+                "</tag2>\n",   //
+                "</tag1>\n",   //
+                "```\n",       //
+            ),
+            Start(RawBlock { format: "html" }, Attributes::new()),
+            Str("<tag1>\n".into()),
+            Str("<tag2>".into()),
+            End(RawBlock { format: "html" }),
+            Blankline,
+            Start(Paragraph, Attributes::new()),
+            Str("paragraph".into()),
+            End(Paragraph),
+            Blankline,
+            Start(RawBlock { format: "html" }, Attributes::new()),
+            Str("</tag2>\n".into()),
+            Str("</tag1>".into()),
             End(RawBlock { format: "html" }),
         );
     }

tests/html-ut/ut/raw_blocks.test

@@ -0,0 +1,19 @@
+````
+```=html
+<tag1>
+<tag2>
+```
+
+paragraph
+
+```=html
+</tag2>
+</tag1>
+```
+.
+<tag1>
+<tag2>
+<p>paragraph</p>
+</tag2>
+</tag1>
+````