The TOML spec has been updated to allow literal strings

Note is now removed

text/0000-cargo-cfg-dependencies.md

@@ -43,7 +43,7 @@ winapi = "0.2"
 [target."cfg(unix)".dependencies]
 unix-socket = "0.4"
 
-[target."cfg(target_os = \"macos\")".dependencies]
+[target.'cfg(target_os = "macos")'.dependencies]
 core-foundation = "0.2"
 ```
 
@@ -52,16 +52,6 @@ the string "cfg(" and ends with ")". If this is not true then Cargo will
 continue to treat it as an opaque string and pass it to the compiler via
 `--target` (Cargo's current behavior).
 
-> **Note**: There's an [issue open against TOML][toml-issue] to support
-> single-quoted keys allowing more ergonomic syntax in some cases like:
->
-> ```toml
-> [target.'cfg(target_os = "macos")'.dependencies]
-> core-foundation = "0.2"
-> ```
-
-[toml-issue]: https://github.com/toml-lang/toml/issues/354
-
 Cargo will implement its own parser of this syntax inside the `cfg` expression,
 it will not rely on the compiler itself. The grammar, however, will be the same
 as the compiler for now: