fix(markdown-parser): promote blockquote prefix markers from skipped trivia to explicit CST nodes

crates/biome_markdown_formatter/src/generated.rs

@@ -1025,6 +1025,44 @@ impl IntoFormat<MarkdownFormatContext> for biome_markdown_syntax::MdQuote {
         )
     }
 }
+impl FormatRule<biome_markdown_syntax::MdQuotePrefix>
+    for crate::markdown::auxiliary::quote_prefix::FormatMdQuotePrefix
+{
+    type Context = MarkdownFormatContext;
+    #[inline(always)]
+    fn fmt(
+        &self,
+        node: &biome_markdown_syntax::MdQuotePrefix,
+        f: &mut MarkdownFormatter,
+    ) -> FormatResult<()> {
+        FormatNodeRule::<biome_markdown_syntax::MdQuotePrefix>::fmt(self, node, f)
+    }
+}
+impl AsFormat<MarkdownFormatContext> for biome_markdown_syntax::MdQuotePrefix {
+    type Format<'a> = FormatRefWithRule<
+        'a,
+        biome_markdown_syntax::MdQuotePrefix,
+        crate::markdown::auxiliary::quote_prefix::FormatMdQuotePrefix,
+    >;
+    fn format(&self) -> Self::Format<'_> {
+        FormatRefWithRule::new(
+            self,
+            crate::markdown::auxiliary::quote_prefix::FormatMdQuotePrefix::default(),
+        )
+    }
+}
+impl IntoFormat<MarkdownFormatContext> for biome_markdown_syntax::MdQuotePrefix {
+    type Format = FormatOwnedWithRule<
+        biome_markdown_syntax::MdQuotePrefix,
+        crate::markdown::auxiliary::quote_prefix::FormatMdQuotePrefix,
+    >;
+    fn into_format(self) -> Self::Format {
+        FormatOwnedWithRule::new(
+            self,
+            crate::markdown::auxiliary::quote_prefix::FormatMdQuotePrefix::default(),
+        )
+    }
+}
 impl FormatRule<biome_markdown_syntax::MdReferenceImage>
     for crate::markdown::auxiliary::reference_image::FormatMdReferenceImage
 {

crates/biome_markdown_formatter/src/markdown/any/block.rs

@@ -10,6 +10,7 @@ impl FormatRule<AnyMdBlock> for FormatAnyMdBlock {
         match node {
             AnyMdBlock::AnyMdContainerBlock(node) => node.format().fmt(f),
             AnyMdBlock::AnyMdLeafBlock(node) => node.format().fmt(f),
+            AnyMdBlock::MdQuotePrefix(node) => node.format().fmt(f),
         }
     }
 }

crates/biome_markdown_formatter/src/markdown/any/inline.rs

@@ -18,6 +18,7 @@ impl FormatRule<AnyMdInline> for FormatAnyMdInline {
             AnyMdInline::MdInlineImage(node) => node.format().fmt(f),
             AnyMdInline::MdInlineItalic(node) => node.format().fmt(f),
             AnyMdInline::MdInlineLink(node) => node.format().fmt(f),
+            AnyMdInline::MdQuotePrefix(node) => node.format().fmt(f),
             AnyMdInline::MdReferenceImage(node) => node.format().fmt(f),
             AnyMdInline::MdReferenceLink(node) => node.format().fmt(f),
             AnyMdInline::MdSoftBreak(node) => node.format().fmt(f),

crates/biome_markdown_formatter/src/markdown/auxiliary/mod.rs

@@ -27,6 +27,7 @@ pub(crate) mod newline;
 pub(crate) mod ordered_list_item;
 pub(crate) mod paragraph;
 pub(crate) mod quote;
+pub(crate) mod quote_prefix;
 pub(crate) mod reference_image;
 pub(crate) mod reference_link;
 pub(crate) mod reference_link_label;

crates/biome_markdown_formatter/src/markdown/auxiliary/quote_prefix.rs

@@ -0,0 +1,10 @@
+use crate::prelude::*;
+use biome_markdown_syntax::MdQuotePrefix;
+use biome_rowan::AstNode;
+#[derive(Debug, Clone, Default)]
+pub(crate) struct FormatMdQuotePrefix;
+impl FormatNodeRule<MdQuotePrefix> for FormatMdQuotePrefix {
+    fn fmt_fields(&self, node: &MdQuotePrefix, f: &mut MarkdownFormatter) -> FormatResult<()> {
+        format_verbatim_node(node.syntax()).fmt(f)
+    }
+}

crates/biome_markdown_parser/src/syntax/mod.rs

@@ -56,7 +56,7 @@ use list::{
 };
 use quote::{
     at_quote, consume_quote_prefix, consume_quote_prefix_without_virtual, has_quote_prefix,
-    parse_quote,
+    line_has_quote_prefix_at_current, parse_quote,
 };
 use thematic_break_block::{at_thematic_break_block, parse_thematic_break_block};
 
@@ -757,7 +757,7 @@ fn allow_setext_heading(p: &MarkdownParser) -> bool {
         return true;
     }
 
-    line_has_quote_prefix(p, depth)
+    line_has_quote_prefix_at_current(p, depth)
 }
 
 /// Compute the real leading indent of the current line from source text.
@@ -783,51 +783,6 @@ fn real_line_indent_from_source(p: &MarkdownParser) -> usize {
     column
 }
 
-fn line_has_quote_prefix(p: &MarkdownParser, depth: usize) -> bool {
-    // Tokens may have consumed whitespace as trivia; scan source to recover columns.
-    if depth == 0 {
-        return false;
-    }
-
-    let source = p.source().source_text();
-    let start: usize = p.cur_range().start().into();
-    let line_start = source[..start].rfind('\n').map_or(0, |idx| idx + 1);
-
-    let mut idx = line_start;
-    let mut indent = 0usize;
-    while idx < start {
-        match source.as_bytes()[idx] {
-            b' ' => {
-                indent += 1;
-                idx += 1;
-            }
-            b'\t' => {
-                indent += 4;
-                idx += 1;
-            }
-            _ => break,
-        }
-        if indent > 3 {
-            return false;
-        }
-    }
-
-    for _ in 0..depth {
-        if idx >= start || source.as_bytes()[idx] != b'>' {
-            return false;
-        }
-        idx += 1;
-        if idx < start {
-            let c = source.as_bytes()[idx];
-            if c == b' ' || c == b'\t' {
-                idx += 1;
-            }
-        }
-    }
-
-    true
-}
-
 fn classify_quote_break_after_newline(
     p: &mut MarkdownParser,
     quote_depth: usize,