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Version 0.5.3
  - Bug fixes and compilation fixes.

  - Best match mode (-B) for agrep.

Version 0.5.2
  - System ABI support.  TRE is now by default configured to be
    compatible with the system regex binary interface (by including
    the system regex.h and using the definitions there instead of
    TRE's own).  This can be disabled with --disable-system-abi.

  - Added a pkg-config file `tre.pc'.

  - Added support for minimal (non-greedy) repetition operators
    "*?", "+?", "??", and "{m,n}?".  They work similarly to the ones
    in Perl, except the number of characters matched is minimized
    instead of the number of repetitions.

  - Added some documentation in the doc/ subdirectory.

  - Bug fixes.

Version 0.5.1
  - Bug fixes.

Version 0.5.0
  - Approximate matching functions now fill the pmatch[] array of
    submatches if wanted.

  - Support for back referencing (not for approximate matching).

  - Changed approximate matching API to be more easily extendible in
    the future.  The match cost is now returned.

  - Bug fixes.

  - Windows project files (original versions contributed by Aymeric
    Moizard <jack@atosc.org>, thanks!).

Version 0.4.1
  - Fixed installed headers.

  - Fixed compilation problems.

Version 0.4.0
  - The name of the package changed to TRE.

  - New API for approximate regexp matching.

  - New command line utility `agrep' for approximate regexp matching
    in the style of grep.

  - New translation for Finnish (fi) has been added.

  - Optimizations in regexec.

  - Wide character support and multibyte character set support can be
    turned off with --disable-wchar and --disable-multibyte,

  - Lots of bugfixes.