Split GreaterBlock into CenterBlock, QuoteBlock, and SpecialBlock.

Center and quote blocks do not have parameters nor do they store their name so I am separating them out.

src/iter/all_ast_node_iter.rs

@@ -24,7 +24,9 @@ impl<'r, 's> Iterator for AllAstNodeIter<'r, 's> {
                 AstNodeIter::Paragraph(ref mut i) => i.next(),
                 AstNodeIter::PlainList(ref mut i) => i.next(),
                 AstNodeIter::PlainListItem(ref mut i) => i.next(),
-                AstNodeIter::GreaterBlock(ref mut i) => i.next(),
+                AstNodeIter::CenterBlock(ref mut i) => i.next(),
+                AstNodeIter::QuoteBlock(ref mut i) => i.next(),
+                AstNodeIter::SpecialBlock(ref mut i) => i.next(),
                 AstNodeIter::DynamicBlock(ref mut i) => i.next(),
                 AstNodeIter::FootnoteDefinition(ref mut i) => i.next(),
                 AstNodeIter::Comment(ref mut i) => i.next(),

src/iter/ast_node_iter.rs

@@ -7,6 +7,7 @@ use crate::types::AngleLink;
 use crate::types::AstNode;
 use crate::types::BabelCall;
 use crate::types::Bold;
+use crate::types::CenterBlock;
 use crate::types::Citation;
 use crate::types::CitationReference;
 use crate::types::Clock;
@@ -26,7 +27,6 @@ use crate::types::ExportSnippet;
 use crate::types::FixedWidthArea;
 use crate::types::FootnoteDefinition;
 use crate::types::FootnoteReference;
-use crate::types::GreaterBlock;
 use crate::types::Heading;
 use crate::types::HorizontalRule;
 use crate::types::InlineBabelCall;
@@ -46,10 +46,12 @@ use crate::types::PlainListItem;
 use crate::types::PlainText;
 use crate::types::Planning;
 use crate::types::PropertyDrawer;
+use crate::types::QuoteBlock;
 use crate::types::RadioLink;
 use crate::types::RadioTarget;
 use crate::types::RegularLink;
 use crate::types::Section;
+use crate::types::SpecialBlock;
 use crate::types::SrcBlock;
 use crate::types::StatisticsCookie;
 use crate::types::StrikeThrough;
@@ -78,7 +80,9 @@ pub(crate) enum AstNodeIter<'r, 's> {
     Paragraph(ParagraphIter<'r, 's>),
     PlainList(PlainListIter<'r, 's>),
     PlainListItem(PlainListItemIter<'r, 's>),
-    GreaterBlock(GreaterBlockIter<'r, 's>),
+    CenterBlock(CenterBlockIter<'r, 's>),
+    QuoteBlock(QuoteBlockIter<'r, 's>),
+    SpecialBlock(SpecialBlockIter<'r, 's>),
     DynamicBlock(DynamicBlockIter<'r, 's>),
     FootnoteDefinition(FootnoteDefinitionIter<'r, 's>),
     Comment(CommentIter<'r, 's>),
@@ -140,7 +144,9 @@ impl<'r, 's> AstNodeIter<'r, 's> {
             AstNode::Paragraph(inner) => AstNodeIter::Paragraph(inner.into_iter()),
             AstNode::PlainList(inner) => AstNodeIter::PlainList(inner.into_iter()),
             AstNode::PlainListItem(inner) => AstNodeIter::PlainListItem(inner.into_iter()),
-            AstNode::GreaterBlock(inner) => AstNodeIter::GreaterBlock(inner.into_iter()),
+            AstNode::CenterBlock(inner) => AstNodeIter::CenterBlock(inner.into_iter()),
+            AstNode::QuoteBlock(inner) => AstNodeIter::QuoteBlock(inner.into_iter()),
+            AstNode::SpecialBlock(inner) => AstNodeIter::SpecialBlock(inner.into_iter()),
             AstNode::DynamicBlock(inner) => AstNodeIter::DynamicBlock(inner.into_iter()),
             AstNode::FootnoteDefinition(inner) => {
                 AstNodeIter::FootnoteDefinition(inner.into_iter())
@@ -232,8 +238,18 @@ multi_field_iter!(
     std::slice::Iter<'r, Element<'s>>
 );
 children_iter!(
-    GreaterBlock<'s>,
-    GreaterBlockIter,
+    CenterBlock<'s>,
+    CenterBlockIter,
+    std::slice::Iter<'r, Element<'s>>
+);
+children_iter!(
+    QuoteBlock<'s>,
+    QuoteBlockIter,
+    std::slice::Iter<'r, Element<'s>>
+);
+children_iter!(
+    SpecialBlock<'s>,
+    SpecialBlockIter,
     std::slice::Iter<'r, Element<'s>>
 );
 children_iter!(