config: replace `.unwrap_or` with `.map_or`

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/src/config/config_type.rs b/src/config/config_type.rs
index bf9cd8597321f65d2ff70be31d0187959243703b..edd6ae5634f590cc712c53986eb603d2073d326a 100644 (file)
--- a/src/config/config_type.rs
+++ b/src/config/config_type.rs
@@ -72,9 +72,7 @@ fn doc_hint() -> String {
 /// nightly compiler when installed from crates.io, default to nightly mode.
 macro_rules! is_nightly_channel {
     () => {
-        option_env!("CFG_RELEASE_CHANNEL")
-            .map(|c| c == "nightly" || c == "dev")
-            .unwrap_or(true)
+        option_env!("CFG_RELEASE_CHANNEL").map_or(true, |c| c == "nightly" || c == "dev")
     };
 }