Major clean up and improvements to vimwiki compatibility and documentation.

Reviewed-on: #1

crates/nuwiki-core/tests/syntax.rs

@@ -136,7 +136,7 @@ fn registry_can_parse_through_trait_object() {
 }
 
 /// Compile-time check: SyntaxRegistry must be Send + Sync so the LSP server
-/// can share it across handler tasks (SPEC.md §6.3).
+/// can share it across handler tasks.
 #[test]
 fn registry_is_send_and_sync() {
     fn assert_send_sync<T: Send + Sync>() {}

crates/nuwiki-core/tests/tags.rs

@@ -1,4 +1,4 @@
-//! Phase 12 tag tests: lexer + parser + renderer behaviour on
+//! Tag tests: lexer + parser + renderer behaviour on
 //! `:tag:` lines, plus the scope-detection rules.
 
 use nuwiki_core::ast::{BlockNode, TagScope};