gdb: reformat Python files with black 23.1.0

Change-Id: Ie8ec8870a16d71c5858f5d08958309d23c318302
Reviewed-By: Tom Tromey <tom@tromey.com>
Reviewed-By: Andrew Burgess <aburgess@redhat.com>

gdb/python/lib/gdb/FrameDecorator.py

@@ -64,7 +64,6 @@ class FrameDecorator(object):
             or frame.type() == gdb.DUMMY_FRAME
             or frame.type() == gdb.SIGTRAMP_FRAME
         ):
-
             return True
 
         return False

gdb/python/lib/gdb/command/frame_filters.py

@@ -20,6 +20,7 @@ import sys
 import gdb
 import gdb.frames
 
+
 # GDB Commands.
 class SetFilterPrefixCmd(gdb.Command):
     """Prefix command for 'set' frame-filter related operations."""

gdb/python/lib/gdb/dap/server.py

@@ -116,7 +116,7 @@ class Server:
             self._send_json(result)
             events = self.delayed_events
             self.delayed_events = []
-            for (event, body) in events:
+            for event, body in events:
                 self.send_event(event, body)
         # Got the terminate request.  This is handled by the
         # JSON-writing thread, so that we can ensure that all

gdb/python/lib/gdb/printing.py

@@ -228,7 +228,7 @@ class _EnumInstance:
         flag_list = []
         v = int(self.val)
         any_found = False
-        for (e_name, e_value) in self.enumerators:
+        for e_name, e_value in self.enumerators:
             if v & e_value != 0:
                 flag_list.append(e_name)
                 v = v & ~e_value