Remove the unnecessary backticks

Author: linyihai

src/cargo/ops/cargo_package.rs

@@ -431,12 +431,12 @@ fn error_custom_build_file_not_in_package(
     let tip = {
         let description_name = target.description_named();
         if path.is_file() {
-            format!("the source file of `{description_name}` doesn't appear to be a path inside of the package.\n\
+            format!("the source file of {description_name} doesn't appear to be a path inside of the package.\n\
             It is at `{}`, whereas the root the package is `{}`.\n",
             path.display(), pkg.root().display()
             )
         } else {
-            format!("the source file of `{description_name}` doesn't appear to exist.\n",)
+            format!("the source file of {description_name} doesn't appear to exist.\n",)
         }
     };
     let msg = format!(

tests/testsuite/package.rs

@@ -3325,7 +3325,7 @@ fn build_script_outside_pkg_root() {
     let mut expect_msg = String::from("\
 warning: manifest has no documentation, homepage or repository.
 See https://doc.rust-lang.org/cargo/reference/manifest.html#package-metadata for more info.
-error: the source file of `build script` doesn't appear to exist.
+error: the source file of build script doesn't appear to exist.
 This may cause issue during packaging, as modules resolution and resources included via macros are often relative to the path of source files.
 Please update the `build` setting in the manifest at `[CWD]/Cargo.toml` and point to a path inside the root of the package.
 ");
@@ -3343,7 +3343,7 @@ Please update the `build` setting in the manifest at `[CWD]/Cargo.toml` and poin
         "\
 warning: manifest has no documentation, homepage or repository.
 See https://doc.rust-lang.org/cargo/reference/manifest.html#package-metadata for more info.
-error: the source file of `build script` doesn't appear to be a path inside of the package.
+error: the source file of build script doesn't appear to be a path inside of the package.
 It is at `{}/t_custom_build/custom_build.rs`, whereas the root the package is `[CWD]`.
 This may cause issue during packaging, as modules resolution and resources included via macros are often relative to the path of source files.
 Please update the `build` setting in the manifest at `[CWD]/Cargo.toml` and point to a path inside the root of the package.