#1472251: remove addition of "\n" to code given to pdb.run[eval](), the bug in exec() that made this necessary has been fixed.  Also document that you can give code objects to run() and runeval(), and add some tests to test_pdb.

#8015: fix crash when entering an empty line for breakpoint commands.  Also restore environment properly when an exception occurs during the definition of commands.

#1437051: allow "continue"/"next"/etc. in .pdbrc, also add pdb -c option to give these commands.  This allows to run a script until an exception occurs.

#9230: allow Pdb.checkline() to be called without a current frame, for setting breakpoints before starting debugging.

#9411: allow selecting an encoding for configparser files.  Also adds a new test config file to test special cases.

#6538: fix regex documentation again -- use fictional class names "regex" and "match" but do not document them as classes, remove 1.5 compat info and use new default argument syntax where possible.

#1682942: add some ConfigParser features: alternate delimiters, alternate comments, empty lines in values.  Also enhance the docs with more examples and mention SafeConfigParser before ConfigParser.  Patch by Lukas Langa, review by myself, Eric and Ezio.

the first object in the pickle file.