UTC_OFFSET_FORMAT: use const blocks around function calls

Author: RalfJung

time/src/serde/mod.rs

@@ -407,18 +407,20 @@ impl<'a> Deserialize<'a> for Time {
 /// The format used when serializing and deserializing a human-readable `UtcOffset`.
 #[cfg(feature = "parsing")]
 const UTC_OFFSET_FORMAT: &[BorrowedFormatItem<'_>] = &[
-    BorrowedFormatItem::Component(Component::OffsetHour({
+    BorrowedFormatItem::Component(Component::OffsetHour(const {
         let mut m = modifier::OffsetHour::default();
         m.sign_is_mandatory = true;
         m
     })),
     BorrowedFormatItem::Optional(&BorrowedFormatItem::Compound(&[
         BorrowedFormatItem::Literal(b":"),
-        BorrowedFormatItem::Component(Component::OffsetMinute(modifier::OffsetMinute::default())),
+        BorrowedFormatItem::Component(Component::OffsetMinute(
+            const { modifier::OffsetMinute::default() },
+        )),
         BorrowedFormatItem::Optional(&BorrowedFormatItem::Compound(&[
             BorrowedFormatItem::Literal(b":"),
             BorrowedFormatItem::Component(Component::OffsetSecond(
-                modifier::OffsetSecond::default(),
+                const { modifier::OffsetSecond::default() },
             )),
         ])),
     ])),