diff --git a/README.md b/README.md
index cefed6f..22739b8 100644
--- a/README.md
+++ b/README.md
@@ -399,13 +399,11 @@ The error includes all normal `io` mishaps, like a missing file:
 ```rust
 use env_file_reader::read_file;
 
-fn main() {
-  let err = read_file(".env.which.does.not.exist")
-    .err()
-    .unwrap();
+let err = read_file(".env.which.does.not.exist")
+  .err()
+  .unwrap();
     
-  assert_eq!(err.kind(), std::io::ErrorKind::NotFound);
-}
+assert_eq!(err.kind(), std::io::ErrorKind::NotFound);
 ```
 
 Additionally, parsing can fail due to an ill-formatted environment
@@ -415,12 +413,10 @@ If that is the case, a custom error, `ParseError`, is returned:
 ```rust
 use env_file_reader::read_str;
 
-fn main() {
-  let err = read_str("badly formatted env file")
-    .err()
-    .unwrap();
+let err = read_str("badly formatted env file")
+  .err()
+  .unwrap();
 
-  assert_eq!(err.kind(), std::io::ErrorKind::InvalidInput);
-  assert_eq!(err.to_string(), "ParseError");
-}
+assert_eq!(err.kind(), std::io::ErrorKind::InvalidInput);
+assert_eq!(err.to_string(), "ParseError");
 ```
diff --git a/TODO.md b/TODO.md
index 6c34d9a..d8e4fd8 100644
--- a/TODO.md
+++ b/TODO.md
@@ -14,8 +14,6 @@
 
 * [x] test suite
 
-* [ ] clippy action
-
 * [ ] release `v0.3.0`
 
 * [ ] type support through `serde`
diff --git a/src/env_file.lalrpop b/src/env_file.lalrpop
index c9a178d..5db6701 100644
--- a/src/env_file.lalrpop
+++ b/src/env_file.lalrpop
@@ -15,18 +15,18 @@ extern {
     "ident" => Token::Ident(<String>),
     "qs" => Token::QuotedString(<String>),
     "\n" => Token::NewLine,
-    "EOF" => Token::EOF,
+    "eof" => Token::Eof,
   }
 }
 
 pub EnvFile: HashMap<String, String> = {
-  <Line*> => HashMap::from_iter(<>.into_iter().filter_map(|x| x)),
+  <Line*> => HashMap::from_iter(<>.into_iter().flatten()),
 }
 
 Line: Option<(String, String)> = {
   <k:Key> "=" <v:Value> => Some((k, v)),
   "\n" => None,
-  "EOF" => None,
+  "eof" => None,
 };
 
 Key: String = "export"? <k:"ident"> => k;
@@ -35,5 +35,5 @@ Value: String = {
   "ident" => <>,
   "qs" => <>,
   "\n" => String::new(),
-  "EOF" => String::new(),
+  "eof" => String::new(),
 };
diff --git a/src/lexer.rs b/src/lexer.rs
index 803249b..3d0b4d4 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -12,14 +12,12 @@ use std::error::Error;
 /// ```rust
 /// use env_file_reader::read_str;
 ///
-/// fn main() {
-///   let err = read_str("badly formatted env file")
-///     .err()
-///     .unwrap();
+/// let err = read_str("badly formatted env file")
+///   .err()
+///   .unwrap();
 ///
-///   assert_eq!(err.kind(), std::io::ErrorKind::InvalidInput);
-///   assert_eq!(err.to_string(), "ParseError");
-/// }
+/// assert_eq!(err.kind(), std::io::ErrorKind::InvalidInput);
+/// assert_eq!(err.to_string(), "ParseError");
 /// ```
 ///
 #[derive(Debug)]
@@ -46,7 +44,7 @@ fn remove_quotes(lex: &mut logos::Lexer<Token>) -> String {
   let escaped_newline_pattern = "\\n";
 
   slice[1..slice.len() - 1]
-    .replace(&escaped_quote_pattern, &quote)
+    .replace(&escaped_quote_pattern, quote)
     .replace(escaped_newline_pattern, "\n")
 }
 
@@ -64,7 +62,7 @@ pub enum Token {
   #[regex(r"`[^`]*`", remove_quotes)]
   #[regex(r#""([^"]|\\")*""#, remove_quotes)]
   QuotedString(String),
-  EOF,
+  Eof,
   #[error]
   #[regex(r"#.*", logos::skip)]
   #[regex(r"\s+", logos::skip)]
@@ -98,18 +96,16 @@ impl<'input> Iterator for Lexer<'input> {
 
   fn next(&mut self) -> Option<Self::Item> {
     match self.token_stream.next() {
-      Some((token, span)) => {
-        match token {
-          Token::Error => Some(Err(ParseError)),
-          _ => Some(Ok((span.start, token, span.end))),
-        }
-      }
+      Some((token, span)) => match token {
+        Token::Error => Some(Err(ParseError)),
+        _ => Some(Ok((span.start, token, span.end))),
+      },
       None => {
         if self.finished() {
           None
         } else {
           self.finish();
-          Some(Ok((0, Token::EOF, 0)))
+          Some(Ok((0, Token::Eof, 0)))
         }
       }
     }