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-rw-r--r--lib/irb/input-method.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/irb/input-method.rb b/lib/irb/input-method.rb
index 9fba4ed852..49c52bd8da 100644
--- a/lib/irb/input-method.rb
+++ b/lib/irb/input-method.rb
@@ -369,7 +369,7 @@ module IRB
right_x = cursor_pos_to_render.x + autocomplete_dialog.width
if right_x + width > screen_width
- right_width = screen_width - (right_x + 0)
+ right_width = screen_width - (right_x + 1)
left_x = autocomplete_dialog.column - width
left_x = 0 if left_x < 0
left_width = width > autocomplete_dialog.column ? autocomplete_dialog.column : width