Run doctests with alloc feature if possible

Author: pitdicker

src/format/mod.rs

@@ -17,7 +17,7 @@
 //!
 //! # Example
 //! ```
-//! # #[cfg(feature = "std")] {
+//! # #[cfg(feature = "alloc")] {
 //! use chrono::{NaiveDateTime, TimeZone, Utc};
 //!
 //! let date_time = Utc.with_ymd_and_hms(2020, 11, 10, 0, 1, 32).unwrap();

src/lib.rs

@@ -385,7 +385,7 @@
 //! to get the number of additional number of nanoseconds.
 //!
 //! ```
-//! # #[cfg(feature = "std")] {
+//! # #[cfg(feature = "alloc")] {
 //! // We need the trait in scope to use Utc::timestamp().
 //! use chrono::{DateTime, Utc};
 //!

src/naive/time/mod.rs

@@ -949,7 +949,7 @@ impl Timelike for NaiveTime {
     /// Use the proper [formatting method](#method.format) to get a human-readable representation.
     ///
     /// ```
-    /// # #[cfg(feature = "std")] {
+    /// # #[cfg(feature = "alloc")] {
     /// # use chrono::{NaiveTime, Timelike};
     /// let leap = NaiveTime::from_hms_milli_opt(23, 59, 59, 1_000).unwrap();
     /// assert_eq!(leap.second(), 59);
@@ -982,7 +982,7 @@ impl Timelike for NaiveTime {
     /// use the proper [formatting method](#method.format) to get a human-readable representation.
     ///
     /// ```
-    /// # #[cfg(feature = "std")] {
+    /// # #[cfg(feature = "alloc")] {
     /// # use chrono::{NaiveTime, Timelike};
     /// let leap = NaiveTime::from_hms_milli_opt(23, 59, 59, 1_000).unwrap();
     /// assert_eq!(leap.nanosecond(), 1_000_000_000);

src/offset/fixed.rs

@@ -50,7 +50,7 @@ impl FixedOffset {
     /// # Example
     ///
     /// ```
-    /// # #[cfg(feature = "std")] {
+    /// # #[cfg(feature = "alloc")] {
     /// use chrono::{FixedOffset, TimeZone};
     /// let hour = 3600;
     /// let datetime =
@@ -85,7 +85,7 @@ impl FixedOffset {
     /// # Example
     ///
     /// ```
-    /// # #[cfg(feature = "std")] {
+    /// # #[cfg(feature = "alloc")] {
     /// use chrono::{FixedOffset, TimeZone};
     /// let hour = 3600;
     /// let datetime =