Implemented actual renaming token substitution logic. ...

Implemented /$ENVVAR/ renaming token support.

Added code to __ResolveRenameTokens() to detect renaming tokens in a string, determine their contents, and flag missing delimiters.

Cosmetic cleanup in preparation for rename token processing. ...

Changed regex processing to use match.span() rather than match.start() and match.end().

Consolidated all test mode reporting down into __RenameIt() so that -t will also show any required backup operations.

Fixed a bug that occured when multiple renames iterated over the same filename.

First cut at regex-based matching. ...

-E option removed.  All ErrorMsg calls terminate program immediately now.

Added more bounds checking for individual replacement instance values.

Changed renaming logic to only rename the instances specified on the command line via -i.

Changed -i parsing logic to look for python-style indexes or slice ranges.

Began implementing new logic for selecting replacement "instances". ...

This means -G and -g are no longer necessary.

Changed Rename() to ProcessRenameRequests(). ...

Got rid of the whole name/ext/all target paradigm, thereby eliminating -a, -b, -e, and -L options.

Simplified test mode reporting to only show top level renames and not any consequence backups or skips. ...

Implemented live file renaming.

Moved checks for existing targets from Rename() to RenameIt(). ...

Made check for existing target recursive so existing backups would get backed up.
Implemented min/max new filename length enforcement.
Restructured Rename() so it didn't have to iterate twice over the work queue.

Began restructuring Rename() and added a new supporting RenameIt() method.

Added -P option to allow user to specify their own escape character.

Cleaned up and added more forced renaming logic. ...

Changed -l to -L.
Added framework for -P, to change the default escape string.
Added check to disallow an null string as an argument to -L, -P, -R, and -S.

More cosmetic cleanup.

Changed -v so it dumps and *continues* - this allows its output to be included in a rename output log.

Minor cosmetic cleanup.

Added logic for dumping test output. ...

Added InfoMsg().
Began implementing logic for forced renaming of existing targets.
Added -S option to override forced renaming suffix.

Modified ErrorMsg to accept and optional EXIT argument. This gets rid of most of the sys.exit(1)s that littered the code. ...

Added length constraint checks to newly calculated file/dir names.

Rewrote ProcessIncludes() to properly detect all legal forms of the include option on the command line.

Cleaned up renaming logic to handle old and new stings that contain spaces. ...

Fixed problem with debug option not being properly detected in all cases.

Cleaned up the rename code further when handling -r =something.

Added code to observe reqested case sensitivity when renaming. ...

Added code to handle the case when the old replacement string is null.

Retooled the renaming algorithm in preparation for adding case-insensitivity.

Fixed rename logic to only affect the filename portion of the fully qualified pathname string.

Built basic scaffolding for renaming files. ...

Changed -1 option to -G.
Implemented support for -G, -g.

Modified the contents of ORDERBYCMDLINE and ORDERBYALPHA to use fully qualified filenames.

Retooled the way RenameTargets is structured and populated. ...

Added a separate method to dump RenameTargets for debugging.
Cleaned up bug in ProcessIncludes() that occurred in you included another include without trailing whitespace (-Ix).
Added EXTDELIM, MAXLINELEN, & RENSEP to the ProgramOptions table (like the other options), and adjusted code thoughout to reflect this.