feat[array]: validity in display array

Signed-off-by: Joe Isaacs <[email protected]>

Author: joseph-isaacs

vortex-python/src/arrays/mod.rs

@@ -650,11 +650,11 @@ impl PyArray {
     /// ```python
     /// >>> import vortex as vx
     /// >>> arr = vx.array([1, 2, None, 3])
-    /// >>> print(arr.display_tree())
+    /// >>> print(arr.display_tree()) # doctest: +ELLIPSIS
     /// root: vortex.primitive(i64?, len=4) nbytes=33 B (100.00%)
     ///   metadata: EmptyMetadata
     ///   buffer (align=8): 32 B (96.97%)
-    ///   validity: vortex.bool(bool, len=4) nbytes=1 B (3.03%)
+    ///   validity: vortex.bool(bool, len=4) nbytes=1 B (3.03%)...
     ///     metadata: BoolMetadata { offset: 0 }
     ///     buffer (align=1): 1 B (100.00%)
     /// <BLANKLINE>