safehasattr: pass attribute name as string instead of bytes
This is a step toward replacing `util.safehasattr` usage with plain `hasattr`.
The builtin function behave poorly in Python2 but this was fixed in Python3.
These change are done one by one as they tend to have a small odd to trigger
puzzling breackage.
--- a/mercurial/dispatch.py Thu Feb 02 17:23:20 2023 +0100
+++ b/mercurial/dispatch.py Thu Feb 02 17:23:31 2023 +0100
@@ -116,7 +116,7 @@
err = e
status = -1
- if util.safehasattr(ui, b'ferr'):
+ if util.safehasattr(ui, 'ferr'):
assert ui is not None # help pytype
assert ui.ferr is not None # help pytype
try: