Fix doc warnings for cargo-util::paths
Fix doc warnings for cargo-util::paths

Add parentheses to disambiguate from `write!`.

Signed-off-by: Paul Mabileau <a3aedf8c87c1af3dfeae5f57ddf6d5ae82ad981f@hotmail.fr>

nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,nipunn1313/cargo,eminence/cargo,rust-lang/cargo,eminence/cargo,rust-lang/cargo,rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo,eminence/cargo