Minor faq fix (do -> don't)
Added replace function to the file module
Added deprecated notices to all the sed functions
Merge pull request #7369 from whiteinge/file-search-replace

File search replace
Merge pull request #7366 from joehealy/minor_faq_fix

Minor faq fix (do -> don't)
Merge pull request #7379 from s0undt3ch/hotfix/zero-length-field-name-in-format

No zero length field name in format. It's not supported in python 2.6.
Enable PEP263 pylint plugin. Fixes #7294.