[PATCH] Fix two minor flake8 issues

[Tom Tromey <tromey@adacore.com>]

flake8 pointed out some extra whitespace around ':' in some Python
code.
---
 gdb/python/lib/gdb/command/frame_filters.py | 2 +-
 gdb/python/lib/gdb/prompt.py                | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/python/lib/gdb/command/frame_filters.py b/gdb/python/lib/gdb/command/frame_filters.py
index 47045518e64..41f61ff19bc 100644
--- a/gdb/python/lib/gdb/command/frame_filters.py
+++ b/gdb/python/lib/gdb/command/frame_filters.py
@@ -191,7 +191,7 @@ def _complete_frame_filter_list(text, word, all_flag):
 
     # If we only have one completion, complete it and return it.
     if len(flist) == 1:
-        flist[0] = flist[0][len(text) - len(word) :]
+        flist[0] = flist[0][len(text) - len(word):]
 
     # Otherwise, return an empty list, or a list of frame filter
     # dictionaries that the previous filter operation returned.
diff --git a/gdb/python/lib/gdb/prompt.py b/gdb/python/lib/gdb/prompt.py
index 02185b353df..e00e4b0a521 100644
--- a/gdb/python/lib/gdb/prompt.py
+++ b/gdb/python/lib/gdb/prompt.py
@@ -146,7 +146,7 @@ def substitute_prompt(prompt):
                     if j >= plen or prompt[j] != "}":
                         arg = None
                     else:
-                        arg = prompt[i + 2 : j]
+                        arg = prompt[i + 2:j]
                         i = j
                 else:
                     arg = None
-- 
2.43.0