Stop using clone() on Copy types

https://github.com/Manishearth/rust-clippy/wiki#clone_on_copy

src/naive/date.rs

@@ -482,7 +482,7 @@ impl NaiveDate {
     /// ~~~~
     #[inline]
     pub fn and_time(&self, time: NaiveTime) -> NaiveDateTime {
-        NaiveDateTime::new(self.clone(), time)
+        NaiveDateTime::new(*self, time)
     }
 
     /// Makes a new `NaiveDateTime` from the current date, hour, minute and second.
@@ -884,7 +884,7 @@ impl NaiveDate {
     #[inline]
     pub fn format_with_items<'a, I>(&self, items: I) -> DelayedFormat<I>
             where I: Iterator<Item=Item<'a>> + Clone {
-        DelayedFormat::new(Some(self.clone()), None, items)
+        DelayedFormat::new(Some(*self), None, items)
     }
 
     /// Formats the date with the specified format string.

src/naive/datetime.rs

@@ -505,7 +505,7 @@ impl NaiveDateTime {
     #[inline]
     pub fn format_with_items<'a, I>(&self, items: I) -> DelayedFormat<I>
             where I: Iterator<Item=Item<'a>> + Clone {
-        DelayedFormat::new(Some(self.date.clone()), Some(self.time.clone()), items)
+        DelayedFormat::new(Some(self.date), Some(self.time), items)
     }
 
     /// Formats the combined date and time with the specified format string.

src/naive/time.rs

@@ -652,7 +652,7 @@ impl NaiveTime {
     #[inline]
     pub fn format_with_items<'a, I>(&self, items: I) -> DelayedFormat<I>
             where I: Iterator<Item=Item<'a>> + Clone {
-        DelayedFormat::new(None, Some(self.clone()), items)
+        DelayedFormat::new(None, Some(*self), items)
     }
 
     /// Formats the time with the specified format string.

src/offset/fixed.rs

@@ -82,17 +82,17 @@ impl FixedOffset {
 impl TimeZone for FixedOffset {
     type Offset = FixedOffset;
 
-    fn from_offset(offset: &FixedOffset) -> FixedOffset { offset.clone() }
+    fn from_offset(offset: &FixedOffset) -> FixedOffset { *offset }
 
     fn offset_from_local_date(&self, _local: &NaiveDate) -> LocalResult<FixedOffset> {
-        LocalResult::Single(self.clone())
+        LocalResult::Single(*self)
     }
     fn offset_from_local_datetime(&self, _local: &NaiveDateTime) -> LocalResult<FixedOffset> {
-        LocalResult::Single(self.clone())
+        LocalResult::Single(*self)
     }
 
-    fn offset_from_utc_date(&self, _utc: &NaiveDate) -> FixedOffset { self.clone() }
+    fn offset_from_utc_date(&self, _utc: &NaiveDate) -> FixedOffset { *self }
-    fn offset_from_utc_datetime(&self, _utc: &NaiveDateTime) -> FixedOffset { self.clone() }
+    fn offset_from_utc_datetime(&self, _utc: &NaiveDateTime) -> FixedOffset { *self }
 }
 
 impl Offset for FixedOffset {

src/offset/local.rs

@@ -111,7 +111,7 @@ impl TimeZone for Local {
         // in the other words, we use the offset at the local midnight
         // but keep the actual date unaltered (much like `FixedOffset`).
         let midnight = self.from_local_datetime(&local.and_hms(0, 0, 0));
-        midnight.map(|datetime| Date::from_utc(*local, datetime.offset().clone()))
+        midnight.map(|datetime| Date::from_utc(*local, *datetime.offset()))
     }
     fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Local>> {
         let timespec = datetime_to_timespec(local, true);
@@ -120,7 +120,7 @@ impl TimeZone for Local {
 
     fn from_utc_date(&self, utc: &NaiveDate) -> Date<Local> {
         let midnight = self.from_utc_datetime(&utc.and_hms(0, 0, 0));
-        Date::from_utc(*utc, midnight.offset().clone())
+        Date::from_utc(*utc, *midnight.offset())
     }
     fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Local> {
         let timespec = datetime_to_timespec(utc, false);

src/offset/mod.rs

@@ -333,13 +333,13 @@ pub trait TimeZone: Sized + Clone {
     /// Converts the UTC `NaiveDate` to the local time.
     /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time).
     fn from_utc_date(&self, utc: &NaiveDate) -> Date<Self> {
-        Date::from_utc(utc.clone(), self.offset_from_utc_date(utc))
+        Date::from_utc(*utc, self.offset_from_utc_date(utc))
     }
 
     /// Converts the UTC `NaiveDateTime` to the local time.
     /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time).
     fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Self> {
-        DateTime::from_utc(utc.clone(), self.offset_from_utc_datetime(utc))
+        DateTime::from_utc(*utc, self.offset_from_utc_datetime(utc))
     }
 }