link tracking issue for RFC 2795

Author: nikomatsakis

text/2795-format-args-implicit-identifiers.md

@@ -1,7 +1,7 @@
 - Feature Name: `format_args_implicits`
 - Start Date: 2019-10-27
 - RFC PR: [rust-lang/rfcs#0000](https://github.com/rust-lang/rfcs/pull/0000)
-- Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
+- Rust Issue: [rust-lang/rust#67984](https://github.com/rust-lang/rust/issues/67984)
 
 
 # Summary