refactor: core: Use string literal concatenation, not addition.

Author: neiljp

zulipterminal/core.py

@@ -698,27 +698,26 @@ def _raise_exception(self, *args: Any, **kwargs: Any) -> Literal[True]:
                     traceback.print_exception(*exc, file=logfile)
                 message = (
                     "An exception occurred:"
-                    + "\n\n"
-                    + "".join(traceback.format_exception_only(exc[0], exc[1]))
-                    + "\n"
-                    + "The application should continue functioning, but you "
-                    + "may notice inconsistent behavior in this session."
-                    + "\n\n"
-                    + "Please report this to us either in"
-                    + "\n"
-                    + "* the #zulip-terminal stream"
-                    + "\n"
-                    + "  (https://chat.zulip.org/#narrow/stream/"
-                    + "206-zulip-terminal in the webapp)"
-                    + "\n"
-                    + "* an issue at "
-                    + "https://github.com/zulip/zulip-terminal/issues"
-                    + "\n\n"
-                    + "Details of the exception can be found in "
-                    + exception_logfile
-                    + "\n\n"
-                    + f"Press [{primary_display_key_for_command('COPY_TRACEBACK')}]"
-                    + " to copy traceback to clipboard."
+                    "\n\n"
+                    f"{''.join(traceback.format_exception_only(exc[0], exc[1]))}"
+                    "\n"
+                    "The application should continue functioning, but you "
+                    "may notice inconsistent behavior in this session."
+                    "\n\n"
+                    "Please report this to us either in"
+                    "\n"
+                    "* the #zulip-terminal stream"
+                    "\n"
+                    "  (https://chat.zulip.org/#narrow/stream/"
+                    "206-zulip-terminal in the webapp)"
+                    "\n"
+                    "* an issue at "
+                    "https://github.com/zulip/zulip-terminal/issues"
+                    "\n\n"
+                    f"Details of the exception can be found in {exception_logfile}"
+                    "\n\n"
+                    f"Press [{primary_display_key_for_command('COPY_TRACEBACK')}]"
+                    " to copy traceback to clipboard."
                 )
                 full_traceback = "".join(traceback.format_exception(*exc))
                 self.show_exception_popup(message, traceback=full_traceback, width=80)