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Uses idlelib.searchengine.SearchEngine for search capability.
Defines various replace related functions like replace, replace all,
and replace+find.
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do_replace)r r$ r r r r a s zReplaceDialog.replace_itc C s" | � | j�r | �� r | � d� dS )z�Handle the Replace+Find button as the default command.
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Search text for occurrences of the Find value and replace
each of them. The 'wrap around' value controls the start
point for searching. If wrap isn't set, then the searching
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if wrap is set, the replacement starts at the first line.
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