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    $obj->print(sprintf("Page %d - Section %d - %s",
                              $obj->current_page,
                              $obj->section->num,
                              $obj->section->name,
                           )
                   );

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    BEFORE   | AFTER  | COMMENT
-------------+--------+----------------
...
             |        | in double quotes
  '\\^(foo)' | \^(foo)| Confused with '\BAR'?
  "\\^(foo)" | ^(foo) | Double quotes

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    BEFORE   | AFTER  | COMMENT
-------------+--------+----------------
...
  '^ ^(foo)' | ^ BAR  | No need to escape
                      | ^ unless part of
                      | ^(foo) match.

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    BEFORE   | AFTER  | COMMENT
-------------+--------+-----------------
...
                      | part of pattern
'^(^)^(foo)' | ^BAR   | Explicit escape
'^^(^)(foo)' | ^^BAR  | Or ^(^)^(^)^(foo)