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When I do:

sed 's/@driver.quit/#@driver.quit' set_QA_district_name_spec.rb 

I get the error shown in the title.

How can I get around this error, what is wrong?

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up vote 5 down vote accepted

The substitute expression was missing the end slash, e.g.

sed 's/@driver.quit/#@driver.quit' set_QA_district_name_spec.rb 

should be

sed 's/@driver\.quit/#@driver.quit/' set_QA_district_name_spec.rb 

Once it worked I added the -i ('in-place') flag so the file itself was actually replaced, e.g.

sed -i 's/@driver\.quit/#@driver.quit/' set_QA_district_name_spec.rb 
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