Update is_empty docs.

src/module/mod.rs

@@ -591,7 +591,7 @@ impl Module {
         self.custom_types.get(key)
     }
 
-    /// Is the [`Module`] empty?
+    /// Returns `true` if this [`Module`] contains no items.
     ///
     /// # Example
     ///

src/module/resolvers/collection.rs

@@ -86,7 +86,7 @@ impl ModuleResolversCollection {
         self.0.clear();
         self
     }
-    /// Is this [`ModuleResolversCollection`] empty?
+    /// Returns `true` if this [`ModuleResolversCollection`] contains no module resolvers.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {

src/module/resolvers/stat.rs

@@ -98,7 +98,7 @@ impl StaticModuleResolver {
         self.0.clear();
         self
     }
-    /// Is this [`StaticModuleResolver`] empty?
+    /// Returns `true` if this [`StaticModuleResolver`] contains no module resolvers.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {