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* test(textinput): Add test for backspace at beginning of line in textarea Introduce a test to reproduce and verify the fix for backspacing at the beginning of a line in a multiline textarea. This ensures that pressing Backspace when the cursor is at the start of a line correctly removes the newline without deleting the entire previous line’s content. Related to: #27523 Signed-off-by: Emmanuel Elom <elomemmanuel007@gmail.com> * fix(textinput): Preserve selection origin when adjusting vertical position Fixes an issue where pressing Backspace at the beginning of a line in a textarea incorrectly deleted the entire previous line's content. This happened because `self.adjust_vertical(-1, select)` modified `selection_origin` and `edit_point`, but `selection_origin` was not restored before performing the horizontal adjustment. As a result, `self.selection_start()` and `self.selection_end()` were inconsistent, leading to `replace_operation` erasing the entire line. Now, we temporarily store `selection_origin` before adjusting vertical position and restore it afterward to ensure proper cursor and selection behavior. Fixes: #27523 Signed-off-by: Emmanuel Elom <elomemmanuel007@gmail.com> --------- Signed-off-by: Emmanuel Elom <elomemmanuel007@gmail.com> Co-authored-by: Josh Matthews <josh@joshmatthews.net>