fix clippy errors

src/dispatching/dispatcher.rs

@@ -107,6 +107,7 @@ where
     /// [`shutdown`]: ShutdownToken::shutdown
     #[cfg(feature = "ctrlc_handler")]
     #[cfg_attr(all(docsrs, feature = "nightly"), doc(cfg(feature = "ctrlc_handler")))]
+    #[must_use]
     pub fn setup_ctrlc_handler(self) -> Self {
         let state = Arc::clone(&self.state);
         tokio::spawn(async move {

src/dispatching2/dialogue/dialogue_handler_ext.rs

@@ -3,6 +3,7 @@ use dptree::{di::DependencyMap, Handler};
 use std::sync::Arc;
 
 pub trait DialogueHandlerExt {
+    #[must_use]
     fn add_dialogue<Upd, S, D>(self) -> Self
     where
         S: Storage<D> + Send + Sync + 'static,

src/dispatching2/dialogue/mod.rs

@@ -28,11 +28,7 @@ pub struct Dialogue<D, S> {
 // but `S` wrapped around Arc, and `D` wrapped around PhantomData.
 impl<D, S> Clone for Dialogue<D, S> {
     fn clone(&self) -> Self {
-        Dialogue {
-            storage: self.storage.clone(),
-            chat_id: self.chat_id.clone(),
-            _phantom: PhantomData,
-        }
+        Dialogue { storage: self.storage.clone(), chat_id: self.chat_id, _phantom: PhantomData }
     }
 }
 

src/dispatching2/dispatcher.rs

@@ -65,6 +65,7 @@ where
     /// [`shutdown`]: ShutdownToken::shutdown
     #[cfg(feature = "ctrlc_handler")]
     #[cfg_attr(docsrs, doc(cfg(feature = "ctrlc_handler")))]
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn setup_ctrlc_handler(self) -> Self {
         let state = Arc::clone(&self.state);
         tokio::spawn(async move {
@@ -227,21 +228,25 @@ where
         }
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn handler(self, handler: UpdateHandler<Err>) -> Self {
         Dispatcher { handler: self.handler.branch(handler), ..self }
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     // Specify handler that will be called if other handlers was not handle the
     // update.
     pub fn default_handler(self, handler: UpdateHandler<Err>) -> Self {
         Dispatcher { handler: self.handler.branch(handler), ..self }
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     // Specify dependencies that can be used inside of handlers.
     pub fn dependencies(self, dependencies: DependencyMap) -> Self {
         Dispatcher { dependencies, ..self }
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn messages_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -253,6 +258,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn edited_messages_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -264,6 +270,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn channel_posts_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -275,6 +282,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn edited_channel_posts_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -286,6 +294,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn inline_queries_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -297,6 +306,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn chosen_inline_results_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -308,6 +318,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn callback_queries_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -319,6 +330,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn shipping_queries_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -330,6 +342,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn pre_checkout_queries_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -341,6 +354,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn polls_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -352,6 +366,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn poll_answers_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -363,6 +378,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn my_chat_members_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,
@@ -374,6 +390,7 @@ where
         self.handler(handler)
     }
 
+    #[must_use = "Call .dispatch() or .dispatch_with_listener() function to start dispatching."]
     pub fn chat_members_handler(
         mut self,
         make_handler: impl FnOnce(UpdateHandler<Err>) -> UpdateHandler<Err>,

src/dispatching2/handler_ext.rs

@@ -2,10 +2,12 @@ use crate::{dispatching2::HandlerFactory, types::Message, utils::command::BotCom
 use dptree::{di::DependencyMap, Handler};
 
 pub trait HandlerExt<Output> {
+    #[must_use]
     fn add_command<C>(self, bot_name: String) -> Self
     where
         C: BotCommand + Send + Sync + 'static;
 
+    #[must_use]
     fn dispatch_by<F>(self) -> Self
     where
         F: HandlerFactory<Out = Output>;

src/utils/html.rs

@@ -61,7 +61,7 @@ pub fn code_block(code: &str) -> String {
 pub fn code_block_with_lang(code: &str, lang: &str) -> String {
     format!(
         "<pre><code class=\"language-{}\">{}</code></pre>",
-        escape(lang).replace("\"", "&quot;"),
+        escape(lang).replace('"', "&quot;"),
         escape(code)
     )
 }
@@ -81,7 +81,7 @@ pub fn code_inline(s: &str) -> String {
 ///
 /// [spec]: https://core.telegram.org/bots/api#html-style
 pub fn escape(s: &str) -> String {
-    s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
+    s.replace('&', "&amp;").replace('<', "&lt;").replace('>', "&gt;")
 }
 
 pub fn user_mention_or_link(user: &User) -> String {

src/utils/markdown.rs

@@ -89,36 +89,36 @@ pub fn code_inline(s: &str) -> String {
 ///
 /// [spec]: https://core.telegram.org/bots/api#html-style
 pub fn escape(s: &str) -> String {
-    s.replace("_", r"\_")
-        .replace("*", r"\*")
-        .replace("[", r"\[")
-        .replace("]", r"\]")
-        .replace("(", r"\(")
-        .replace(")", r"\)")
-        .replace("~", r"\~")
-        .replace("`", r"\`")
-        .replace(">", r"\>")
-        .replace("#", r"\#")
-        .replace("+", r"\+")
-        .replace("-", r"\-")
-        .replace("=", r"\=")
-        .replace("|", r"\|")
-        .replace("{", r"\{")
-        .replace("}", r"\}")
-        .replace(".", r"\.")
-        .replace("!", r"\!")
+    s.replace('_', r"\_")
+        .replace('*', r"\*")
+        .replace('[', r"\[")
+        .replace(']', r"\]")
+        .replace('(', r"\(")
+        .replace(')', r"\)")
+        .replace('~', r"\~")
+        .replace('`', r"\`")
+        .replace('>', r"\>")
+        .replace('#', r"\#")
+        .replace('+', r"\+")
+        .replace('-', r"\-")
+        .replace('=', r"\=")
+        .replace('|', r"\|")
+        .replace('{', r"\{")
+        .replace('}', r"\}")
+        .replace('.', r"\.")
+        .replace('!', r"\!")
 }
 
 /// Escapes all markdown special characters specific for the inline link URL
 /// (``` and `)`).
 pub fn escape_link_url(s: &str) -> String {
-    s.replace("`", r"\`").replace(")", r"\)")
+    s.replace('`', r"\`").replace(')', r"\)")
 }
 
 /// Escapes all markdown special characters specific for the code block (``` and
 /// `\`).
 pub fn escape_code(s: &str) -> String {
-    s.replace(r"\", r"\\").replace("`", r"\`")
+    s.replace('\\', r"\\").replace('`', r"\`")
 }
 
 pub fn user_mention_or_link(user: &User) -> String {