More practical clippy settings, simplify some checks

src/editor.rs

@@ -65,7 +65,6 @@ impl Editor {
         let args: Vec<String> = env::args().collect();
         let mut initial_status = String::from("HELP: Ctrl-S = save | Ctrl-Q = quit");
         let document = if let Some(file_name) = args.get(1) {
-            let file_name = &args[1];
             let doc = Document::open(&file_name);
             if let Ok(doc) = doc {
                 doc
@@ -285,11 +284,8 @@ impl Editor {
         let terminal_height = self.terminal.size().height as usize;
         let Position { mut y, mut x } = self.cursor_position;
         let height = self.document.len();
-        let mut width = if let Some(row) = self.document.row(y) {
+
-            row.len()
+        let mut width = self.document.row(y).map_or(0, Row::len);
-        } else {
-            0
-        };
 
         match key {
             Key::Up => y = y.saturating_sub(1),
@@ -303,11 +299,7 @@ impl Editor {
                     x -= 1;
                 } else if y > 0 {
                     y -= 1;
-                    if let Some(row) = self.document.row(y) {
+                    x = self.document.row(y).map_or(0, Row::len);
-                        x = row.len()
-                    } else {
-                        x = 0
-                    }
                 }
             },
             Key::Right => {
@@ -337,11 +329,7 @@ impl Editor {
             _ => (),
         }
 
-        width = if let Some(row) = self.document.row(y) {
+        width = self.document.row(y).map_or(0, Row::len);
-            row.len()
-        } else {
-            0
-        };
 
         if x > width {
             x = width;

src/main.rs

@@ -1,11 +1,8 @@
-#![warn(clippy::all, clippy::pedantic, clippy::restriction)]
+#![warn(clippy::all, clippy::pedantic)]
 #![allow(
-    clippy::missing_docs_in_private_items,
+    clippy::missing_errors_doc,
-    clippy::implicit_return,
+    clippy::must_use_candidate,
-    clippy::shadow_reuse,
+    clippy::panic,
-    clippy::print_stdout,
-    clippy::wildcard_enum_match_arm,
-    clippy::else_if_without_else
 )]
 mod document;
 mod editor;