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Originally Posted by eschwartz
In this case it appears to be a typo.
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Off course! And should be corrected. There are plenty more. In a manual such should not be.
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re: unwanted side effects -- anything can happen when you perform sweeping changes. Best to confirm that your regex performs as expected, rather than changing things which you didn't realize would be caught.
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Practically speaking Before
perform sweeping changes in large amounts:
a) Back up (all) your stuff before proceeding.
b) Do previously a small sample.