fix cargo clippy

Author: o2sh

src/onefetch/image_backends/sixel.rs

@@ -70,6 +70,7 @@ impl SixelBackend {
 }
 
 impl super::ImageBackend for SixelBackend {
+    #[allow(clippy::map_entry)]
     fn add_image(&self, lines: Vec<String>, image: &DynamicImage, colors: usize) -> Result<String> {
         let tty_size = unsafe {
             let tty_size: winsize = std::mem::zeroed();

src/onefetch/language.rs

@@ -140,9 +140,10 @@ macro_rules! define_languages {
                         const ASCII: &str = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/resources/", $ascii));
                         let lines: Vec<_> = ASCII.lines().skip_while(|line| line.is_empty()).collect();
                         let (start, end) = get_min_start_max_end(&lines);
-                            if (end - start > MAX_WIDTH) {
-                                panic!("{} is too wide", $ascii)
-                            }
+                        assert!(start <= end);
+                        if (end - start > MAX_WIDTH) {
+                            panic!("{} is too wide", $ascii)
+                        }
                     }
 
                     #[test]