bring prefix_is in line with is_prefixed_by

crates/astria-core/src/primitive/v1/asset.rs

@@ -80,8 +80,12 @@ impl Denom {
     pub fn prefix_is(&self, prefix: &str) -> bool {
         // For the current implementation, the number of slashes in a prefix is equal to the number
         // of segments + 1.
-        // So a "path/to" would be a prefix to `"path/to/denom"`, but `"path/to/"` would not
-        let number_of_slashes = prefix.chars().filter(|c| *c == '/').count();
+        let number_of_slashes = prefix
+            .strip_suffix('/')
+            .unwrap_or(prefix)
+            .chars()
+            .filter(|c| *c == '/')
+            .count();
         if number_of_slashes.saturating_add(1) != self.prefix_segments.len() {
             return false;
         }
@@ -362,8 +366,8 @@ mod tests {
         let input = "path/to/denom";
         let denom = input.parse::<Denom>().unwrap();
         assert!(denom.prefix_is("path/to"));
+        assert!(denom.prefix_is("path/to/"));
         assert!(!denom.prefix_is("path/to/denom"));
-        assert!(!denom.prefix_is("path/to/"));
         assert!(!denom.prefix_is("/path/to"));
         assert!(!denom.prefix_is("/path/to/"));
     }