Merge pull request 1737 from nyurik/doc-fix

src/file.rs

@@ -15,8 +15,7 @@ ast_struct! {
     ///
     /// ```
     /// use std::env;
-    /// use std::fs::File;
-    /// use std::io::Read;
+    /// use std::fs::read_to_string;
     /// use std::process;
     ///
     /// fn main() {
@@ -34,11 +33,7 @@ ast_struct! {
     ///         }
     ///     };
     ///
-    ///     let mut file = File::open(&filename).expect("unable to open file");
-    ///
-    ///     let mut src = String::new();
-    ///     file.read_to_string(&mut src).expect("unable to read file");
-    ///
+    ///     let src = read_to_string(&filename).expect("unable to read file");
     ///     let syntax = syn::parse_file(&src).expect("unable to parse file");
     ///
     ///     // Debug impl is available if Syn is built with "extra-traits" feature.

src/lib.rs

@@ -973,14 +973,11 @@ pub fn parse_str<T: parse::Parse>(s: &str) -> Result<T> {
 ///
 /// ```no_run
 /// use std::error::Error;
-/// use std::fs::File;
+/// use std::fs::read_to_string;
 /// use std::io::Read;
 ///
 /// fn run() -> Result<(), Box<dyn Error>> {
-///     let mut file = File::open("path/to/code.rs")?;
-///     let mut content = String::new();
-///     file.read_to_string(&mut content)?;
-///
+///     let content = read_to_string("path/to/code.rs")?;
 ///     let ast = syn::parse_file(&content)?;
 ///     if let Some(shebang) = ast.shebang {
 ///         println!("{}", shebang);