Use backticks for documentation examples

The rustdoc documentation and the book only show examples as escaped
with backticks.

src/datetime.rs

@@ -83,12 +83,12 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// # Example
     ///
-    /// ~~~~
+    /// ```
     /// use chrono::{DateTime, TimeZone, NaiveDateTime, Utc};
     ///
     /// let dt = DateTime::<Utc>::from_utc(NaiveDateTime::from_timestamp(61, 0), Utc);
     /// assert_eq!(Utc.timestamp(61, 0), dt);
-    /// ~~~~
+    /// ```
     //
     // note: this constructor is purposely not named to `new` to discourage the direct usage.
     #[inline]
@@ -158,7 +158,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// # Example
     ///
-    /// ~~~~
+    /// ```
     /// use chrono::Utc;
     /// use chrono::TimeZone;
     ///
@@ -167,7 +167,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// let dt = Utc.ymd(2001, 9, 9).and_hms_milli(1, 46, 40, 555);
     /// assert_eq!(dt.timestamp_millis(), 1_000_000_000_555);
-    /// ~~~~
+    /// ```
     #[inline]
     pub fn timestamp_millis(&self) -> i64 {
         self.datetime.timestamp_millis()
@@ -182,7 +182,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// # Example
     ///
-    /// ~~~~
+    /// ```
     /// use chrono::Utc;
     /// use chrono::TimeZone;
     ///
@@ -191,7 +191,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// let dt = Utc.ymd(2001, 9, 9).and_hms_micro(1, 46, 40, 555);
     /// assert_eq!(dt.timestamp_micros(), 1_000_000_000_000_555);
-    /// ~~~~
+    /// ```
     #[inline]
     pub fn timestamp_micros(&self) -> i64 {
         self.datetime.timestamp_micros()
@@ -206,7 +206,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// # Example
     ///
-    /// ~~~~
+    /// ```
     /// use chrono::Utc;
     /// use chrono::TimeZone;
     ///
@@ -215,7 +215,7 @@ impl<Tz: TimeZone> DateTime<Tz> {
     ///
     /// let dt = Utc.ymd(2001, 9, 9).and_hms_nano(1, 46, 40, 555);
     /// assert_eq!(dt.timestamp_nanos(), 1_000_000_000_000_000_555);
-    /// ~~~~
+    /// ```
     #[inline]
     pub fn timestamp_nanos(&self) -> i64 {
         self.datetime.timestamp_nanos()

src/format/mod.rs

@@ -835,26 +835,26 @@ impl<'a, I: Iterator<Item = B> + Clone, B: Borrow<Item<'a>>> fmt::Display for De
 ///
 /// # Example
 ///
-/// ~~~~
+/// ```
 /// use chrono::Weekday;
 ///
 /// assert_eq!("Sunday".parse::<Weekday>(), Ok(Weekday::Sun));
 /// assert!("any day".parse::<Weekday>().is_err());
-/// ~~~~
+/// ```
 ///
 /// The parsing is case-insensitive.
 ///
-/// ~~~~
+/// ```
 /// # use chrono::Weekday;
 /// assert_eq!("mON".parse::<Weekday>(), Ok(Weekday::Mon));
-/// ~~~~
+/// ```
 ///
 /// Only the shortest form (e.g. `sun`) and the longest form (e.g. `sunday`) is accepted.
 ///
-/// ~~~~
+/// ```
 /// # use chrono::Weekday;
 /// assert!("thurs".parse::<Weekday>().is_err());
-/// ~~~~
+/// ```
 impl FromStr for Weekday {
     type Err = ParseWeekdayError;
 
@@ -908,27 +908,27 @@ where
 ///
 /// # Example
 ///
-/// ~~~~
+/// ```
 /// use chrono::Month;
 ///
 /// assert_eq!("January".parse::<Month>(), Ok(Month::January));
 /// assert!("any day".parse::<Month>().is_err());
-/// ~~~~
+/// ```
 ///
 /// The parsing is case-insensitive.
 ///
-/// ~~~~
+/// ```
 /// # use chrono::Month;
 /// assert_eq!("fEbruARy".parse::<Month>(), Ok(Month::February));
-/// ~~~~
+/// ```
 ///
 /// Only the shortest form (e.g. `jan`) and the longest form (e.g. `january`) is accepted.
 ///
-/// ~~~~
+/// ```
 /// # use chrono::Month;
 /// assert!("septem".parse::<Month>().is_err());
 /// assert!("Augustin".parse::<Month>().is_err());
-/// ~~~~
+/// ```
 impl FromStr for Month {
     type Err = ParseMonthError;