'Find in files' by replacing 'open with implicit close' by 'with open' in
GrepDialog method grep_it. Streamline code with enumerate(), direct file
iteration, and output tweak. Add test for this method, including output format.

Problem noted & original patch by Serhiy Storchaka; I tweaked the patch a bit.

http://www.freebsd.org/doc/en/books/arch-handbook/driverbasics-block.html

http://www.freebsd.org/doc/en/books/arch-handbook/driverbasics-block.html

Don't create a temporary buffer of zeroy byte nor call r_string() if the length
is zero, create directly the empty string.

* Move the constants used by os.open() to after the description of os.open(),
  instead of putting them in their own section.

* Move RTLD_* constants to "Miscellaneous System Information" section, and
  mention the sys functions they're used with.

* Mention dir_fd parameter in os.open() text.

* Typo fix ("are a supported by").

* state that python3 source encoding is UTF-8, and give examples

* mention surrogateescape in the 'tips and tricks' section, and
  backslashreplace in the "Python's Unicode Support" section.

* Describe Unicode support provided by the re module.

* link to Nick Coghlan's and Ned Batchelder's notes/presentations.

* default filesystem encoding is now UTF-8, not ascii.

* Describe StreamRecoder class.

* update acks section

* remove usage of "I think", "I'm not going to", etc.

* various edits

* remove revision history and original outline

Add -b and -X options to python man page.
Patch contributed by Corey Brune.

Patch contributed by Corey Brune.

The exception is the import related questions at the end, which
need to be rewritten anyway.