Add punctuation highlighting for highlighting punctuation in doctests, fix highlighting in doctests

crates/ra_ide/src/syntax_highlighting/injection.rs

@@ -150,9 +150,7 @@ pub(super) fn highlight_doc_comment(
     let (analysis, tmp_file_id) = Analysis::from_single_file(text);
 
     stack.push();
-    for mut h in analysis
-        .with_db(|db| super::highlight(db, tmp_file_id, None, true, Some(HighlightTag::Operator)))
-        .unwrap()
+    for mut h in analysis.with_db(|db| super::highlight(db, tmp_file_id, None, true, true)).unwrap()
     {
         // Determine start offset and end offset in case of multi-line ranges
         let mut start_offset = None;