update docs for random on embedded

src/builder.rs

@@ -127,7 +127,12 @@ impl Uuid {
     ///     uuid.to_hyphenated().to_string(),
     /// );
     /// ```
-    pub const fn from_fields_le(d1: u32, d2: u16, d3: u16, d4: &[u8; 8]) -> Uuid {
+    pub const fn from_fields_le(
+        d1: u32,
+        d2: u16,
+        d3: u16,
+        d4: &[u8; 8],
+    ) -> Uuid {
         Uuid::from_bytes([
             d1 as u8,
             (d1 >> 8) as u8,

src/lib.rs

@@ -114,7 +114,9 @@
 //!
 //! If you need to use `v4` in a no-std environment, you'll need to
 //! follow [`getrandom`'s docs] on configuring a source of randomness
-//! on currently unsupported targets.
+//! on currently unsupported targets. Alternatively, you can produce
+//! random bytes yourself and then pass them to [`Builder::from_random_bytes`]
+//! without enabling the `v4` feature.
 //!
 //! # Examples
 //!

src/v4.rs

@@ -7,7 +7,8 @@ impl Uuid {
     /// as the source of random numbers. If you'd like to use a custom
     /// generator, don't use this method: generate random bytes using your
     /// custom generator and pass them to the
-    /// [`uuid::Builder::from_random_bytes`][from_random_bytes] function instead.
+    /// [`uuid::Builder::from_random_bytes`][from_random_bytes] function
+    /// instead.
     ///
     /// Note that usage of this method requires the `v4` feature of this crate
     /// to be enabled.