Method Get():backspace() Foundation
Deletes a character to the left of the cursor.
:backspace() --> self
:backSpace() returns a reference to the Get object.
When a Get object has input focus, :backspace() deletes the character to the left of the current cursor position in the edit buffer and positions the cursor one character to the left. If the current cursor position is the first editable character, no deletion is performed and the cursor position is unchanged.
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