Slice out the line associated with a tag.

cli/src/tests/tags_test.rs

@@ -56,5 +56,6 @@ fn test_tags_python() {
     );
 
     assert_eq!(tags[0].docs.as_ref().unwrap(), "Data about a customer");
+    assert_eq!(tags[0].line, "class Customer:");
     assert_eq!(tags[1].docs.as_ref().unwrap(), "Get the customer's age");
 }

tags/src/lib.rs

@@ -224,6 +224,11 @@ where
                 let config = &self.config;
                 let tag_from_node = |node: Node, kind: TagKind| -> Option<Tag> {
                     let name = str::from_utf8(&source[name_node?.byte_range()]).ok()?;
+                    let mut line_range = node.byte_range();
+                    if line_range.len() > 180 {
+                        line_range.end = line_range.start + 180;
+                    }
+                    let line = str::from_utf8(&source[line_range]).ok()?.lines().next()?;
                     let docs = doc_node
                         .and_then(|n| str::from_utf8(&source[n.byte_range()]).ok())
                         .map(|s| {
@@ -235,7 +240,7 @@ where
                         });
                     Some(Tag {
                         name,
-                        line: "TODO",
+                        line,
                         loc: loc_for_node(node),
                         kind: kind,
                         docs,