chore: ensure source of KeywordDoc is always a string

Author: d-biehl

packages/language_server/src/robotcode/language_server/robotframework/diagnostics/imports_manager.py

@@ -1222,7 +1222,7 @@ def _create_handler(self, kw: Any) -> Any:
                     args=[KeywordArgumentDoc.from_robot(a) for a in kw[0].args],
                     doc=kw[0].doc,
                     tags=list(kw[0].tags),
-                    source=kw[0].source,
+                    source=str(kw[0].source),
                     name_token=get_keyword_name_token_from_line(kw[0].lineno),
                     line_no=kw[0].lineno if kw[0].lineno is not None else -1,
                     col_offset=-1,

packages/language_server/src/robotcode/language_server/robotframework/diagnostics/library_doc.py

@@ -888,11 +888,11 @@ def tags(self) -> Any:
     @property
     def source(self) -> Any:
         try:
-            return self.kw.source
+            return str(self.kw.source) if self.kw.source is not None else self.source
         except (SystemExit, KeyboardInterrupt):
             raise
         except BaseException:
-            return self.lib_source
+            return str(self.lib_source) if self.lib_source is not None else self.lib_source
 
     @property
     def lineno(self) -> Any: