diff -r e9bda9b4260b -r bf18415da0c7 QScintilla/Shell.py
--- a/QScintilla/Shell.py Thu Jan 18 11:10:57 2018 +0100
+++ b/QScintilla/Shell.py Thu Jan 18 18:57:40 2018 +0100
@@ -1125,7 +1125,7 @@
delta = evt.delta()
if delta < 0:
self.zoomOut()
- else:
+ elif delta > 0:
self.zoomIn()
evt.accept()
return
@@ -1660,7 +1660,7 @@
self.__setHistoryIndex(index=-1)
elif self.__historyStyle == ShellHistoryStyle.WindowsStyle:
if historyIndex is None:
- if bool(self.__histidx - 1) and \
+ if self.__histidx - 1 > 0 and \
cmd != self.__history[self.__histidx - 1]:
self.__setHistoryIndex(index=-1)
else:
