compilation fix

bitmap_to_asm/src/main.rs

@@ -1,5 +1,5 @@
 use regex::Regex;
-use std::env::args;
+use std::{borrow::Cow, env::args};
 
 fn main() {
     let path = args().nth(1).expect("usage: 1 image file argument");
@@ -12,9 +12,9 @@ fn main() {
         println!("    D 0x{d:08x}");
     }
 }
-fn remove_non_alphanumeric(input: &str) -> String {
+fn remove_non_alphanumeric(input: &str) -> Cow<'_, str> {
     let re = Regex::new(r"[^a-zA-Z0-9_]+").unwrap();
-    re.replace_all(input, "").to_string()
+    re.replace_all(input, "")
 }
 
 fn path_to_img(path: &str) -> (Vec<u32>, String, u32, u32) {
@@ -48,6 +48,9 @@ fn path_to_img(path: &str) -> (Vec<u32>, String, u32, u32) {
     }
     let path = path.split('/').next_back().unwrap();
     let split: Vec<_> = path.split('.').collect();
-    let name = remove_non_alphanumeric(&split[0..split.len() - 1].join("_")).to_lowercase();
+    let name = format!(
+        "picture_{}",
+        remove_non_alphanumeric(&split[0..split.len() - 1].join("_")).to_lowercase()
+    );
     (bytes, name, width, height)
 }