hir-def: Fix warnings about clippy str_to_string rule

Author: tetsuharuohzeki

crates/hir-def/src/body/pretty.rs

@@ -29,11 +29,11 @@ pub(super) fn print_body_hir(db: &dyn DefDatabase, body: &Body, owner: DefWithBo
                 "const {} = ",
                 match &it.name {
                     Some(name) => name.display(db.upcast()).to_string(),
-                    None => "_".to_string(),
+                    None => "_".to_owned(),
                 }
             )
         }),
-        DefWithBodyId::InTypeConstId(_) => "In type const = ".to_string(),
+        DefWithBodyId::InTypeConstId(_) => "In type const = ".to_owned(),
         DefWithBodyId::VariantId(it) => {
             let loc = it.lookup(db);
             let enum_loc = loc.parent.lookup(db);
@@ -123,7 +123,7 @@ impl Printer<'_> {
         wln!(self);
         f(self);
         self.indent_level -= 1;
-        self.buf = self.buf.trim_end_matches('\n').to_string();
+        self.buf = self.buf.trim_end_matches('\n').to_owned();
     }
 
     fn whitespace(&mut self) {

crates/hir-def/src/import_map.rs

@@ -859,7 +859,7 @@ mod tests {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string()).fuzzy(),
+            Query::new("fmt".to_owned()).fuzzy(),
             expect![[r#"
                 dep::fmt (t)
                 dep::fmt::Display::FMT_CONST (a)
@@ -888,9 +888,7 @@ mod tests {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string())
-                .fuzzy()
-                .assoc_search_mode(AssocSearchMode::AssocItemsOnly),
+            Query::new("fmt".to_owned()).fuzzy().assoc_search_mode(AssocSearchMode::AssocItemsOnly),
             expect![[r#"
                 dep::fmt::Display::FMT_CONST (a)
                 dep::fmt::Display::format_function (a)
@@ -901,7 +899,7 @@ mod tests {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string()).fuzzy().assoc_search_mode(AssocSearchMode::Exclude),
+            Query::new("fmt".to_owned()).fuzzy().assoc_search_mode(AssocSearchMode::Exclude),
             expect![[r#"
                 dep::fmt (t)
             "#]],
@@ -937,7 +935,7 @@ pub mod fmt {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string()).fuzzy(),
+            Query::new("fmt".to_owned()).fuzzy(),
             expect![[r#"
                 dep::Fmt (m)
                 dep::Fmt (t)
@@ -951,7 +949,7 @@ pub mod fmt {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string()),
+            Query::new("fmt".to_owned()),
             expect![[r#"
                 dep::Fmt (m)
                 dep::Fmt (t)
@@ -991,7 +989,7 @@ pub mod fmt {
         check_search(
             ra_fixture,
             "main",
-            Query::new("fmt".to_string()),
+            Query::new("fmt".to_owned()),
             expect![[r#"
                 dep::Fmt (m)
                 dep::Fmt (t)
@@ -1015,7 +1013,7 @@ pub mod fmt {
         check_search(
             ra_fixture,
             "main",
-            Query::new("FMT".to_string()),
+            Query::new("FMT".to_owned()),
             expect![[r#"
                 dep::FMT (t)
                 dep::FMT (v)
@@ -1027,7 +1025,7 @@ pub mod fmt {
         check_search(
             ra_fixture,
             "main",
-            Query::new("FMT".to_string()).case_sensitive(),
+            Query::new("FMT".to_owned()).case_sensitive(),
             expect![[r#"
                 dep::FMT (t)
                 dep::FMT (v)

crates/hir-def/src/item_scope.rs

@@ -672,7 +672,7 @@ impl ItemScope {
             format_to!(
                 buf,
                 "{}:",
-                name.map_or("_".to_string(), |name| name.display(db).to_string())
+                name.map_or("_".to_owned(), |name| name.display(db).to_string())
             );
 
             if let Some((.., i)) = def.types {

crates/hir-def/src/item_tree/pretty.rs

@@ -24,7 +24,7 @@ pub(super) fn print_item_tree(db: &dyn DefDatabase, tree: &ItemTree) -> String {
         p.print_mod_item(*item);
     }
 
-    let mut s = p.buf.trim_end_matches('\n').to_string();
+    let mut s = p.buf.trim_end_matches('\n').to_owned();
     s.push('\n');
     s
 }
@@ -58,7 +58,7 @@ impl Printer<'_> {
         wln!(self);
         f(self);
         self.indent_level -= 1;
-        self.buf = self.buf.trim_end_matches('\n').to_string();
+        self.buf = self.buf.trim_end_matches('\n').to_owned();
     }
 
     /// Ensures that a blank line is output before the next text.

crates/hir-def/src/macro_expansion_tests/mod.rs

@@ -224,7 +224,7 @@ fn reindent(indent: IndentLevel, pp: String) -> String {
         return pp;
     }
     let mut lines = pp.split_inclusive('\n');
-    let mut res = lines.next().unwrap().to_string();
+    let mut res = lines.next().unwrap().to_owned();
     for line in lines {
         if line.trim().is_empty() {
             res.push_str(line)