Various updates for v 1.4

- Support hoe >= 3.18
- Various bug fixes and updates

1 files changed, 155 insertions, 149 deletions

diff --git a/History.md b/History.md
index fb0e99c..81a02d2 100644
--- a/History.md
+++ b/History.md
@@ -1,213 +1,217 @@
-## 1.4 / 2019-MM-DD
-
-*   Ruby versions lower than 2.3 are soft-deprecated and will not be run as
-    part of the CI process any longer.
-*   Akinora MUSHA (knu) added the ability for Diff::LCS::Change objects to be
-    implicitly treated arrays. Originally provided as pull request [#47][],
-    but it introduced a number of test failures as documented in [#48][], and
-    remediation of Diff::LCS itself was introduced in [#49][].
-*   Resolved [#5][] with some tests comparing output from `system` calls to
-    `bin/ldiff` with some pre-generated output. Resolved [#6][] with these
-    tests.
-*   Resolved a previously undetected `bin/ldiff` issue with `--context` output
-    not matching `diff --context` output.
-*   Resolved an issue with later versions of Ruby not working with an `OptParse`
-    specification of `Numeric`; this has been changed to `Integer`.
+# History
+
+## 1.4 / 2020-06-23
+
+- Ruby versions lower than 2.4 are soft-deprecated and will not be run as
+  part of the CI process any longer.
+- Akinora MUSHA (knu) added the ability for Diff::LCS::Change objects to be
+  implicitly treated arrays. Originally provided as pull request [#47][],
+  but it introduced a number of test failures as documented in [#48][], and
+  remediation of Diff::LCS itself was introduced in [#49][].
+- Resolved [#5][] with some tests comparing output from `system` calls to
+  `bin/ldiff` with some pre-generated output. Resolved [#6][] with these
+  tests.
+- Resolved a previously undetected `bin/ldiff` issue with `--context` output
+  not matching `diff --context` output.
+- Resolved an issue with later versions of Ruby not working with an `OptParse`
+  specification of `Numeric`; this has been changed to `Integer`.
+- Brandon Fish added truffleruby in [#52][].
+- Fixed two missing classes as reported in [#53][].
 
 ## 1.3 / 2017-01-18
 
-*   Bugs fixed:
+- Bugs fixed:
 
-    *   Fixed an error for bin/ldiff --version. Fixes issue [#21][].
-    *   Force Diff::LCS::Change and Diff::LCS::ContextChange to only perform
-        equality comparisons against themselves. Provided by Kevin Mook in
-        pull request [#29][].
-    *   Fix tab expansion in htmldiff, provided by Mark Friedgan in
-        pull request [#25][].
-    *   Silence Ruby 2.4 Fixnum deprecation warnings. Fixxues issue [#38][] and
-        [pull request#36][].
-    *   Ensure that test dependencies are loaded properly. Fixes issue [#33][]
-        and pull request [#34][].
-    *   Fix issue [#1][] with incorrect intuition of patch direction. Tentative
-        fix, but the previous failure cases pass now.
+  - Fixed an error for bin/ldiff --version. Fixes issue [#21][].
+  - Force Diff::LCS::Change and Diff::LCS::ContextChange to only perform
+    equality comparisons against themselves. Provided by Kevin Mook in
+    pull request [#29][].
+  - Fix tab expansion in htmldiff, provided by Mark Friedgan in
+    pull request [#25][].
+  - Silence Ruby 2.4 Fixnum deprecation warnings. Fixxues issue [#38][] and
+    [pull request#36][].
+  - Ensure that test dependencies are loaded properly. Fixes issue [#33][]
+    and pull request [#34][].
+  - Fix issue [#1][] with incorrect intuition of patch direction. Tentative
+    fix, but the previous failure cases pass now.
 
-*   Tooling changes:
+- Tooling changes:
 
-    *   Added SimpleCov and Coveralls support.
-    *   Change the homepage (temporarily) to the GitHub repo.
-    *   Updated testing and gem infrastructure.
-    *   Modernized the specs.
+  - Added SimpleCov and Coveralls support.
+  - Change the homepage (temporarily) to the GitHub repo.
+  - Updated testing and gem infrastructure.
+  - Modernized the specs.
 
-*   Cleaned up documentation.
+- Cleaned up documentation.
 
-*   Added a Code of Conduct.
+- Added a Code of Conduct.
 
 ## 1.2.5 / 2013-11-08
 
-*   Bugs fixed:
+- Bugs fixed:
 
-    *   Comparing arrays flattened them too far, especially with
-        Diff::LCS.sdiff. Fixed by Josh Bronson in pull request [#23][].
+  - Comparing arrays flattened them too far, especially with
+    Diff::LCS.sdiff. Fixed by Josh Bronson in pull request [#23][].
 
 ## 1.2.4 / 2013-04-20
 
-*   Bugs fixed:
+- Bugs fixed:
 
-    *   A bug was introduced after 1.1.3 when pruning common sequences at the
-        start of comparison. Paul Kunysch (@pck) fixed this in
-        pull request [#18][]. Thanks!
+  - A bug was introduced after 1.1.3 when pruning common sequences at the
+    start of comparison. Paul Kunysch (@pck) fixed this in
+    pull request [#18][]. Thanks!
 
-    *   The Rubinius (1.9 mode) bug in [rubinius/rubinius#2268][] has been
-        fixed by the Rubinius team two days after it was filed. Thanks for
-        fixing this so quickly!
+  - The Rubinius (1.9 mode) bug in [rubinius/rubinius#2268][] has been
+    fixed by the Rubinius team two days after it was filed. Thanks for
+    fixing this so quickly!
 
-*   Switching to Raggi's hoe-gemspec2 for gemspec generation.
+- Switching to Raggi's hoe-gemspec2 for gemspec generation.
 
 ## 1.2.3 / 2013-04-11
 
-*   Bugs Fixed:
+- Bugs Fixed:
 
-    *   The new encoding detection for diff output generation (added in 1.2.2)
-        introduced a bug if the left side of the comparison was the empty set.
-        Originally found in [rspec/rspec-expectations#238][] and
-        [rspec/rspec-expectations#239][]. Jon Rowe developed a reasonable
-        heuristic (left side, right side, empty string literal) to avoid this
-        bug.
-    *   There is a known issue with Rubinius in 1.9 mode reported in
-        [rubinius/rubinius#2268][] and demonstrated in the Travis CI builds.
-        For all other tested platforms, diff-lcs is considered stable. As soon
-        as a suitably small test-case can be created for the Rubinius team to
-        examine, this will be added to the Rubinius issue around this.
+  - The new encoding detection for diff output generation (added in 1.2.2)
+    introduced a bug if the left side of the comparison was the empty set.
+    Originally found in [rspec/rspec-expectations#238][] and
+    [rspec/rspec-expectations#239][]. Jon Rowe developed a reasonable
+    heuristic (left side, right side, empty string literal) to avoid this
+    bug.
+  - There is a known issue with Rubinius in 1.9 mode reported in
+    [rubinius/rubinius#2268][] and demonstrated in the Travis CI builds.
+    For all other tested platforms, diff-lcs is considered stable. As soon
+    as a suitably small test-case can be created for the Rubinius team to
+    examine, this will be added to the Rubinius issue around this.
 
 ## 1.2.2 / 2013-03-30
 
-*   Bugs Fixed:
+- Bugs Fixed:
 
-    *   Diff::LCS::Hunk could not properly generate a difference for comparison
-        sets that are not US-ASCII-compatible because of the use of literal
-        regular expressions and strings. Jon Rowe found this in
-        [rspec/rspec-expectations#219][] and provided a first pass
-        implementation in pull request [#15][]. I've reworked it because of
-        test failures in Rubinius when running in Ruby 1.9 mode. This coerces
-        the added values to the encoding of the old dataset (as determined by
-        the first piece of the old dataset).
-    *   Adding Travis CI testing for Ruby 2.0.
+  - Diff::LCS::Hunk could not properly generate a difference for comparison
+    sets that are not US-ASCII-compatible because of the use of literal
+    regular expressions and strings. Jon Rowe found this in
+    [rspec/rspec-expectations#219][] and provided a first pass
+    implementation in pull request [#15][]. I've reworked it because of
+    test failures in Rubinius when running in Ruby 1.9 mode. This coerces
+    the added values to the encoding of the old dataset (as determined by
+    the first piece of the old dataset).
+  - Adding Travis CI testing for Ruby 2.0.
 
 ## 1.2.1 / 2013-02-09
 
-*   Bugs Fixed:
+- Bugs Fixed:
 
-    *   As seen in [rspec/rspec-expectations#200][], the release of
-        Diff::LCS 1.2 introduced an unnecessary public API change to
-        Diff::LCS::Hunk (see the change at
-        [rspec/rspec-expectations@3d6fc82c][] for details). The new method name
-        (and behaviour) is more correct, but I should not have renamed the
-        function or should have at least provided an alias. This release
-        restores Diff::LCS::Hunk#unshift as an alias to #merge. Note that the
-        old #unshift behaviour was incorrect and will not be restored.
+  - As seen in [rspec/rspec-expectations#200][], the release of
+    Diff::LCS 1.2 introduced an unnecessary public API change to
+    Diff::LCS::Hunk (see the change at
+    [rspec/rspec-expectations@3d6fc82c][] for details). The new method name
+    (and behaviour) is more correct, but I should not have renamed the
+    function or should have at least provided an alias. This release
+    restores Diff::LCS::Hunk#unshift as an alias to #merge. Note that the
+    old #unshift behaviour was incorrect and will not be restored.
 
 ## 1.2.0 / 2013-01-21
 
-*   Minor Enhancements:
-
-    *   Added special case handling for Diff::LCS.patch so that it handles
-        patches that are empty or contain no changes.
-    *   Added two new methods (#patch\_me and #unpatch\_me) to the includable
-        module.
-
-*   Bugs Fixed:
-
-    *   Fixed issue [#1][] patch direction detection.
-    *   Resolved issue [#2][] by handling `string[string.size, 1]` properly (it
-        returns `""` not `nil`).
-    *   Michael Granger (ged) fixed an implementation error in
-        Diff::LCS::Change and added specs in pull request [#8][]. Thanks!
-    *   Made the code auto-testable.
-    *   Vít Ondruch (voxik) provided the latest version of the GPL2 license
-        file in pull request [#10][]. Thanks!
-    *   Fixed a documentation issue with the includable versions of #patch! and
-        #unpatch! where they implied that they would replace the original
-        value. Given that Diff::LCS.patch always returns a copy, the
-        documentation was incorrect and has been corrected. To provide the
-        behaviour that was originally documented, two new methods were added to
-        provide this behaviour. Found by scooter-dangle in issue [#12][].
-        Thanks!
-
-*   Code Style Changes:
-
-    *   Removed trailing spaces.
-    *   Calling class methods using `.` instead of `::`.
-    *   Vít Ondruch (voxik) removed unnecessary shebangs in pull request [#9][].
-        Thanks!
-    *   Kenichi Kamiya (kachick) removed some warnings of an unused variable in
-        lucky pull request [#13][]. Thanks!
-    *   Embarked on a major refactoring to make the files a little more
-        manageable and understand the code on a deeper level.
-    *   Adding to http://travis-ci.org.
+- Minor Enhancements:
+
+  - Added special case handling for Diff::LCS.patch so that it handles
+    patches that are empty or contain no changes.
+  - Added two new methods (#patch_me and #unpatch_me) to the includable
+    module.
+
+- Bugs Fixed:
+
+  - Fixed issue [#1][] patch direction detection.
+  - Resolved issue [#2][] by handling `string[string.size, 1]` properly (it
+    returns `""` not `nil`).
+  - Michael Granger (ged) fixed an implementation error in
+    Diff::LCS::Change and added specs in pull request [#8][]. Thanks!
+  - Made the code auto-testable.
+  - Vít Ondruch (voxik) provided the latest version of the GPL2 license
+    file in pull request [#10][]. Thanks!
+  - Fixed a documentation issue with the includable versions of #patch! and
+    #unpatch! where they implied that they would replace the original
+    value. Given that Diff::LCS.patch always returns a copy, the
+    documentation was incorrect and has been corrected. To provide the
+    behaviour that was originally documented, two new methods were added to
+    provide this behaviour. Found by scooter-dangle in issue [#12][].
+    Thanks!
+
+- Code Style Changes:
+
+  - Removed trailing spaces.
+  - Calling class methods using `.` instead of `::`.
+  - Vít Ondruch (voxik) removed unnecessary shebangs in pull request [#9][].
+    Thanks!
+  - Kenichi Kamiya (kachick) removed some warnings of an unused variable in
+    lucky pull request [#13][]. Thanks!
+  - Embarked on a major refactoring to make the files a little more
+    manageable and understand the code on a deeper level.
+  - Adding to http://travis-ci.org.
 
 ## 1.1.3 / 2011-08-27
 
-*   Converted to 'hoe' for release.
-*   Converted tests to RSpec 2.
-*   Extracted the body of htmldiff into a class available from
-    diff/lcs/htmldiff.
-*   Migrated development and issue tracking to GitHub.
-*   Bugs fixed:
+- Converted to 'hoe' for release.
+- Converted tests to RSpec 2.
+- Extracted the body of htmldiff into a class available from
+  diff/lcs/htmldiff.
+- Migrated development and issue tracking to GitHub.
+- Bugs fixed:
 
-    *   Eliminated the explicit use of RubyGems in both bin/htmldiff and
-        bin/ldiff. Resolves issue [#4][].
-    *   Eliminated Ruby warnings. Resolves issue [#3][].
+  - Eliminated the explicit use of RubyGems in both bin/htmldiff and
+    bin/ldiff. Resolves issue [#4][].
+  - Eliminated Ruby warnings. Resolves issue [#3][].
 
 ## 1.1.2 / 2004-10-20
 
-*   Fixed a problem reported by Mauricio Fernandez in htmldiff.
+- Fixed a problem reported by Mauricio Fernandez in htmldiff.
 
 ## 1.1.1 / 2004-09-25
 
-*   Fixed bug #891 (Set returned from patch command does not contain last equal
-    part).
-*   Fixed a problem with callback initialisation code (it assumed that all
-    callbacks passed as classes can be initialised; now, it rescues
-    NoMethodError in the event of private :new being called).
-*   Modified the non-initialisable callbacks to have a private #new method.
-*   Moved ldiff core code to Diff::LCS::Ldiff (diff/lcs/ldiff.rb).
+- Fixed bug #891 (Set returned from patch command does not contain last equal
+  part).
+- Fixed a problem with callback initialisation code (it assumed that all
+  callbacks passed as classes can be initialised; now, it rescues
+  NoMethodError in the event of private :new being called).
+- Modified the non-initialisable callbacks to have a private #new method.
+- Moved ldiff core code to Diff::LCS::Ldiff (diff/lcs/ldiff.rb).
 
 ## 1.1.0 / -
 
-*   Eliminated the need for Diff::LCS::Event and removed it.
-*   Added a contextual diff callback, Diff::LCS::ContextDiffCallback.
-*   Implemented patching/unpatching for standard Diff callback output formats
-    with both #diff and #sdiff.
-*   Extensive documentation changes.
+- Eliminated the need for Diff::LCS::Event and removed it.
+- Added a contextual diff callback, Diff::LCS::ContextDiffCallback.
+- Implemented patching/unpatching for standard Diff callback output formats
+  with both #diff and #sdiff.
+- Extensive documentation changes.
 
 ## 1.0.4
 
-*   Fixed a problem with bin/ldiff output, especially for unified format.
-    Newlines that should have been present weren't.
-*   Changed the .tar.gz installer to generate Windows batch files if ones do
-    not exist already. Removed the existing batch files as they didn't work.
+- Fixed a problem with bin/ldiff output, especially for unified format.
+  Newlines that should have been present weren't.
+- Changed the .tar.gz installer to generate Windows batch files if ones do
+  not exist already. Removed the existing batch files as they didn't work.
 
 ## 1.0.3
 
-*   Fixed a problem with #traverse\_sequences where the first difference from
-    the left sequence might not be appropriately captured.
+- Fixed a problem with #traverse_sequences where the first difference from
+  the left sequence might not be appropriately captured.
 
 ## 1.0.2
 
-*   Fixed an issue with ldiff not working because actions were changed from
-    symbols to strings.
+- Fixed an issue with ldiff not working because actions were changed from
+  symbols to strings.
 
 ## 1.0.1
 
-*   Minor modifications to the gemspec, the README.
-*   Renamed the diff program to ldiff (as well as the companion batch file) so
-    as to not collide with the standard diff program.
-*   Fixed issues with RubyGems. Requires RubyGems > 0.6.1 or >= 0.6.1 with the
-    latest CVS version.
+- Minor modifications to the gemspec, the README.
+- Renamed the diff program to ldiff (as well as the companion batch file) so
+  as to not collide with the standard diff program.
+- Fixed issues with RubyGems. Requires RubyGems > 0.6.1 or >= 0.6.1 with the
+  latest CVS version.
 
 ## 1.0
 
-*   Initial release based mostly on Perl's Algorithm::Diff.
+- Initial release based mostly on Perl's Algorithm::Diff.
 
 [rubinius/rubinius#2268]: https://github.com/rubinius/rubinius/issues/2268
 [rspec/rspec-expectations#239]: https://github.com/rspec/rspec-expectations/issues/239
@@ -239,3 +243,5 @@
 [#47]: https://github.com/halostatue/diff-lcs/pull/47
 [#48]: https://github.com/halostatue/diff-lcs/issues/48
 [#49]: https://github.com/halostatue/diff-lcs/pull/49
+[#52]: https://github.com/halostatue/diff-lcs/pull/52
+[#53]: https://github.com/halostatue/diff-lcs/issues/53