Re-run 'isort' on gdb tests
Re-running 'isort' (via pre-commit) showed that the file
py-read-memory-leak.py (from the gdb test suite) needed a small patch.
diff --git a/gdb/testsuite/gdb.python/py-read-memory-leak.py b/gdb/testsuite/gdb.python/py-read-memory-leak.py
index 62369b3..430c5c2 100644
--- a/gdb/testsuite/gdb.python/py-read-memory-leak.py
+++ b/gdb/testsuite/gdb.python/py-read-memory-leak.py
@@ -15,6 +15,7 @@
import os
import tracemalloc
+
import gdb
# A global variable in which we store a reference to the memory buffer
