Log message:
Update ruby-sass to 3.4.18.

3.4.17 (21 August 2015)

* Allow passing calc values to rgb/hsl color constructors.
* The source map end character for lists now correctly uses the end of the
  list instead of the end of the first element in the list.
* Fix up some edge cases where extra semicolons could be added to unknown
  directives in compressed mode.
* If you try to do a stupid color operation with a stupid value, the error
  message will now be less stupid than it was.
* Make is-superselector("a > c d", "a > b c d") return \ 
false. This also fixes
  some related @extend behavior.
* A / in a parenthesized list is consistently treated as a plain / unless it
  meets the criteria for being treated as division.
* In sass-convert, ensure that literal /es are preserved.

3.4.16 (10 July 2015)

* When converting from Sass to SCSS or vice versa, double-space around nested
  rules the same as around top-level rules.
* Compatibility with listen 3.
* Parse a minus operator with no surrounding whitespace (e.g. 20px-10px) the
  same regardless of whether it’s being used in a static property.

3.4.15 (22 June 2015)

* Further improve rounding for various numeric operations.
* Be more explicit in the function documentation about functions being
  immutable.
* Improve rounding in operator-based color operations.

Deprecations – Must Read!

* When using --stdin with the sass or scss executables, importing relative to
  the working directory is deprecated. Having the working directory on the
  load path was deprecated in 3.3 and removed in 3.4, but due to an oversight
  the deprecation process never happened for files read over standard input in
  particular. This is the first step of that process.

Log message:
Update ruby-sass to 3.4.14.

3.4.14 (22 May 2015)

* Further avoid race conditions when caching.
* Only emit one warning for each line that uses the deprecated form of
  unquote().
* Stop parsing and emitting invalid @supports directives.
* Add a deprecation warning for using != to compare a number with units to a
  number without. Such a warning already existed for ==.
* Improve rounding of the results of color operations.

Log message:
Update ruby-sass to 3.4.13.

* pkgsrc change: add pkg_alternatives support.

Changes are too many to write here, please refer
http://sass-lang.com/documentation/file.SASS_CHANGELOG.html.

Log message:
Update ruby-sass to 3.2.15

3.2.15 (7 March 2014)

* Support &.foo when the parent selector has a newline followed by a comma.

3.2.14 (24 January 2014)

* Don't crash when parsing a directive with no name in the indented syntax.
* Clean up file paths when importing to avoid errors for overlong path names.
* Parse calls to functions named true, false, and null as function calls.
* Don't move CSS @imports to the top of the file unless it's necessary.

3.2.13 (19 December 2013)

* Numbers returned by user-defined functions now trigger division, just like
  numbers stored in variables.
* Support importing files in paths with open brackets.
* Fix sass-convert's handling of rules with empty bodies when converting from
  CSS.
* Fix CSS imports using url() with a quoted string and media queries.

3.2.12 (4 October 2013)

* Add a couple missing requires, fixing some load errors, especially when
  using the command-line interface.
* Tune up some heuristics for eliminating redundant generated selectors. This
  will prevent some selector elimination in cases where multi-layered @extend
  is being used and where it seems intuitively like selectors shouldn't be
  eliminated.

3.2.11 (27 September 2013)

* Fix @extend's semantics with respect to pseudo-elements. They are no longer
  treated identically to pseudo-classes.
* A more understandable error is now provided when the -E option is passed to
  the Sass command line in ruby 1.8
* Fixed a bug in the output of lists containing unary plus or minus operations
  during sass <=> scss conversion.
* Avoid the IE7 content: counter bug with content: counters as well.
* Fix some thread-safety issues.

Log message:
Update ruby-sass to 3.2.10.

3.2.10

* Use the Sass logger infrastructure for @debug directives.
* When printing a Sass error into a CSS comment, escape */ so the comment
  doesn¡Çt end prematurely.
* Preserve the ! in /*! ... */-style comments.
* Fix a bug where selectors were being incorrectly trimmed when using @extend.
* Fix a bug where sass --unix-newlines and sass-convert --in-place are not
  working on Windows (thanks SATO Kentaro).

3.2.9

* Fix a bug where @extends would occasionally cause a selector to be generated
  with the incorrect specificity.
* Avoid loading listen v1.0, even if it¡Çs installed as a Gem (see issue 719).
* Update the bundled version of listen to 0.7.3.
* Automatically avoid the IE7 content: counter bug.

3.2.8

* Fix some edge cases where redundant selectors were emitted when using @extend.
* Fix a bug where comma-separated lists with interpolation could lose elements.
* Fix a bug in sass-convert where lists being passed as arguments to functions
  or mixins would lose their surrounding parentheses.
* Fix a bug in sass-convert where null wasn¡Çt being converted correctly.
* Fix a bug where multiple spaces in a string literal would sometimes be
  folded together.
* sass and sass-convert won¡Çt create an empty file before writing to it. This
  fixes a flash of unstyled content when using LiveReload and similar tools.
* Fix a case where a corrupted cache could produce fatal errors on some
  versions of Ruby.
* Fix a case where a mixin loop error would be incorrectly reported when using
  @content.

Log message:
Fixes:

 COMMENT should not be longer than 70 characters.
 COMMENT should not begin with 'A'.
 COMMENT should not begin with 'An'.
 COMMENT should not begin with 'a'.
 COMMENT should not end with a period.
 COMMENT should start with a capital letter.

pkglint warnings. Some files also got minor formatting, spelling, and style
corrections.

Log message:
Update ruby-sass to 3.2.7.

3.2.7

* The index and zip functions now work like all other list functions and treat
  individual values as single-element lists.
* Avoid stack overflow errors caused by very long function or mixin argument
  lists.
* Emit relative paths when using the --line-comments flag of the sass
  executable.
* Fix a case where very long numbers would cause the SCSS parser to take
  exponential time.

3.2.6

* Support for Rubinius 2.0.0.rc1. All tests pass in 1.8 mode. 1.9 mode has
  some tests blocked on Rubinius issue 2139.
* Support for JRuby 1.7.2.
* Support for symlinked executables. Thanks to Yin-So Chen.
* Support for bubbling @supports queries in the indented syntax.
* Fix an incorrect warning when using @extend from within nested @media
  queries.
* Update the bundled version of listen to 0.7.2.

Log message:
Update ruby-sass to 3.2.5.

3.2.5

* Fix a bug where bogus @extend warnings were being generated.
* Fix an @import bug on Windows. Thanks to Darryl Miles.
* Ruby 2.0.0-preview compatibility. Thanks to Eric Saxby.
* Fix incorrect line numbering when using DOS line endings with the indented
  syntax.

3.2.4

* Fix imports from .jar files in JRuby. Thanks to Alex Hvostov.
*  Allow comments within @import statements in SCSS.
*  Fix a parsing performance bug where long decimals would occasionally take
   many minutes to parse.

Log message:
Update ruby-sass to 3.2.3.

3.2.3

* sass --watch no longer crashs when a file in a watched directory is deleted.
* Allow @extend within bubbling nodes such as @media.
* Fix various JRuby incompatibilities and test failures.
* Work around a performance bug that arises from using @extend with
  deeply-nested selectors.

3.2.2

* Add a --poll option to force sass --watch to use the polling backend to
  Listen.
* Fix some error reporting bugs related to @import.
* Treat protocol-relative URLs in @imports as static URLs, just like http and
  https URLs.
* Improve the error message for misplaced simple selectors.
* Fix an option-handling bug that was causing errors with the Compass URL
  helpers.
* Fix a performance issue with @import that only appears when ActiveSupport is
  loaded.
* Fix flushing of actions to stdout. Thanks to Russell Davis
  (http://github.com/russelldavis).
* Fix the documentation for the max() function.
* Fix a @media parsing bug.

  Deprecations -- Must Read!

* Sass will now print a warning when it encounters a single @import statement
  that tries to import more than one file. For example, if you have @import
  "screen" and both screen.scss and _screen.scss exist, a warning will be
  printed. This will become an error in future versions of Sass.

Log message:
Update ruby-sass to 3.2.1.

Changes from 3.1.19 is too magy to write here, please refer:
<http://sass-lang.com/docs/yardoc/file.SASS_CHANGELOG.html>.