IMHO that this is _not_a documentation bug.
It would be so if the it were about this scenario:
"if you want to and replace \t, write them in the dialog box as \\t, for not taking the for tabs".
But the scenario is this:
"if you select a text containing \t, the search and replace dialog box shows automatically the selected text with \t instead of \\t".
This is a behavioral bug. The select and replace dialog should replace in the selected text \ with \\ before displaying!
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