style(search): remove em dashes from PR1 comments/docstrings

src/documents/search/_fields.py

@@ -6,7 +6,7 @@ from whoosh_compat import SubpathSpec
 
 # Internal-only schema fields with no query-syntax meaning of their own
 # (sort shadow fields, bigram CJK fields, simple_title/simple_content,
-# autocomplete_word, notes_text) are NOT represented here — they are
+# autocomplete_word, notes_text) are NOT represented here, they are
 # declared in _schema.py's field_descriptors().
 #
 # analyzer/pattern_normalizer are deliberately left at FieldSpec's default

src/documents/search/_registry.py

@@ -64,7 +64,7 @@ def get_field_registry(language: str | None) -> FieldRegistry:
     """Build (or return the cached) FieldRegistry for the given search language.
 
     Cached keyed by language, rebuilt on the same trigger register_tokenizers()
-    uses (settings.SEARCH_LANGUAGE change) — a fresh call with a new language
+    uses (settings.SEARCH_LANGUAGE change). A fresh call with a new language
     builds and caches a new registry rather than mutating the old one.
     """
     if language in _registry_cache:

src/documents/search/_schema.py

@@ -76,7 +76,7 @@ def _public_field_descriptors() -> list[FieldDescriptor]:
                 ),
             )
             if field.name == "notes":
-                # Plain-text companion for snippet generation — tantivy's
+                # Plain-text companion for snippet generation: tantivy's
                 # SnippetGenerator does not support JSON fields. Schema-only,
                 # no query-syntax meaning, not in PUBLIC_FIELDS.
                 descriptors.append(