Fix some clippy lints

crates/ide_assists/src/handlers/convert_comment_block.rs

@@ -96,8 +96,7 @@ fn line_to_block(acc: &mut Assists, comment: ast::Comment) -> Option<()> {
             let block_prefix =
                 CommentKind { shape: CommentShape::Block, ..comment.kind() }.prefix();
 
-            let output =
-                format!("{}\n{}\n{}*/", block_prefix, block_comment_body, indentation.to_string());
+            let output = format!("{}\n{}\n{}*/", block_prefix, block_comment_body, indentation);
 
             edit.replace(target, output)
         },

crates/ide_assists/src/handlers/convert_into_to_from.rs

@@ -91,10 +91,7 @@ pub(crate) fn convert_into_to_from(acc: &mut Assists, ctx: &AssistContext) -> Op
             builder.replace(src_type.syntax().text_range(), dest_type.to_string());
             builder.replace(ast_trait.syntax().text_range(), format!("From<{}>", src_type));
             builder.replace(into_fn_return.syntax().text_range(), "-> Self");
-            builder.replace(
-                into_fn_params.syntax().text_range(),
-                format!("(val: {})", src_type.to_string()),
-            );
+            builder.replace(into_fn_params.syntax().text_range(), format!("(val: {})", src_type));
             builder.replace(into_fn_name.syntax().text_range(), "from");
 
             for s in selfs {

crates/ide_assists/src/handlers/destructure_tuple_binding.rs

@@ -174,7 +174,7 @@ fn edit_tuple_assignment(
 
     // with sub_pattern: keep original tuple and add subpattern: `tup @ (_0, _1)`
     if in_sub_pattern {
-        let text = format!(" @ {}", tuple_pat.to_string());
+        let text = format!(" @ {}", tuple_pat);
         match ctx.config.snippet_cap {
             Some(cap) => {
                 let snip = add_cursor(&text);

crates/ide_assists/src/handlers/extract_module.rs

@@ -298,7 +298,7 @@ impl Module {
                 if let Some(name_ref) = ast::NameRef::cast(desc) {
                     return Some((
                         name_ref.syntax().text_range(),
-                        format!("{}::{}", self.name, name_ref.to_string()),
+                        format!("{}::{}", self.name, name_ref),
                     ));
                 }
             }

crates/ide_assists/src/handlers/generate_documentation_template.rs

@@ -59,9 +59,8 @@ pub(crate) fn generate_documentation_template(
         "Generate a documentation template",
         text_range,
         |builder| {
-            let mut doc_lines = Vec::new();
             // Introduction / short function description before the sections
-            doc_lines.push(introduction_builder(&ast_func, ctx));
+            let mut doc_lines = vec![introduction_builder(&ast_func, ctx)];
             // Then come the sections
             if let Some(mut lines) = examples_builder(&ast_func, ctx) {
                 doc_lines.push("".into());
@@ -303,7 +302,7 @@ fn arguments_from_params(param_list: &ast::ParamList) -> String {
         // instance `TuplePat`) could be managed later.
         Some(ast::Pat::IdentPat(ident_pat)) => match ident_pat.name() {
             Some(name) => match is_a_ref_mut_param(&param) {
-                true => format!("&mut {}", name.to_string()),
+                true => format!("&mut {}", name),
                 false => name.to_string(),
             },
             None => "_".to_string(),

crates/ide_assists/src/handlers/qualify_path.rs

@@ -121,7 +121,7 @@ impl QualifyCandidate<'_> {
             }
             QualifyCandidate::UnqualifiedName(generics) => {
                 let generics = generics.as_ref().map_or_else(String::new, ToString::to_string);
-                replacer(format!("{}{}", import.to_string(), generics));
+                replacer(format!("{}{}", import, generics));
             }
             QualifyCandidate::TraitAssocItem(qualifier, segment) => {
                 replacer(format!("<{} as {}>::{}", qualifier, import, segment));

crates/ide_assists/src/utils.rs

@@ -431,7 +431,7 @@ fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str
     buf.push_str("\n\n");
     adt.attrs()
         .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false))
-        .for_each(|attr| buf.push_str(format!("{}\n", attr.to_string()).as_str()));
+        .for_each(|attr| buf.push_str(format!("{}\n", attr).as_str()));
     buf.push_str("impl");
     if let Some(generic_params) = &generic_params {
         let lifetimes = generic_params.lifetime_params().map(|lt| format!("{}", lt.syntax()));

crates/test_utils/src/fixture.rs

@@ -147,7 +147,7 @@ impl Fixture {
                 if line.starts_with("// ")
                     && line.contains(':')
                     && !line.contains("::")
-                    && !line.contains(".")
+                    && !line.contains('.')
                     && line.chars().all(|it| !it.is_uppercase())
                 {
                     panic!("looks like invalid metadata line: {:?}", line);