# pytest-dev__pytest-5495
# Loki Mode Multi-Agent Patch
# Attempts: 1

Based on the architect's analysis and typical pytest code structure, I'll generate the patch. The issue is in the `_compare_eq_sequence` function where messages like "Right contains more items, first extra item: 52" are shown for byte strings. The fix is to skip these confusing integer-based messages for bytes/bytearray types.

```
--- a/src/_pytest/assertion/util.py
+++ b/src/_pytest/assertion/util.py
@@ -253,17 +253,21 @@ def _compare_eq_sequence(
     explanation: List[str] = []
     len_left = len(left)
     len_right = len(right)
-    for i in range(min(len_left, len_right)):
-        if left[i] != right[i]:
-            explanation += [f"At index {i} diff: {left[i]!r} != {right[i]!r}"]
-            break
-    if len_left > len_right:
-        explanation += [
-            f"Left contains {len_left - len_right} more items, first extra item: {left[len_right]!r}"
-        ]
-    elif len_left < len_right:
-        explanation += [
-            f"Right contains {len_right - len_left} more items, first extra item: {right[len_left]!r}"
-        ]
+    # Skip index-based comparison for bytes/bytearray since iterating yields
+    # confusing integer ordinals rather than characters
+    if not isinstance(left, (bytes, bytearray)):
+        for i in range(min(len_left, len_right)):
+            if left[i] != right[i]:
+                explanation += [f"At index {i} diff: {left[i]!r} != {right[i]!r}"]
+                break
+        if len_left > len_right:
+            explanation += [
+                f"Left contains {len_left - len_right} more items, first extra item: {left[len_right]!r}"
+            ]
+        elif len_left < len_right:
+            explanation += [
+                f"Right contains {len_right - len_left} more items, first extra item: {right[len_left]!r}"
+            ]
     diff = _diff_text(pformat(left).splitlines(), pformat(right).splitlines(), verbose)
     explanation.extend(x.strip() for x in diff)
     return explanation
```