Expose the parser module instead of re-exporting all of its contents.

src/compare/diff.rs

@@ -6,6 +6,7 @@ use crate::parser::CommentBlock;
 use crate::parser::Document;
 use crate::parser::DocumentElement;
 use crate::parser::Drawer;
+use crate::parser::DynamicBlock;
 use crate::parser::Element;
 use crate::parser::ExampleBlock;
 use crate::parser::ExportBlock;
@@ -22,7 +23,6 @@ use crate::parser::Table;
 use crate::parser::TableCell;
 use crate::parser::TableRow;
 use crate::parser::VerseBlock;
-use crate::DynamicBlock;
 
 #[derive(Debug)]
 pub struct DiffResult {