Fix more whitespace stripping bugs

Rakefile

@@ -63,41 +63,30 @@ namespace :test do
 
   desc "Run sass-spec tests against the local code."
   task :spec do
-    require "yaml"
-    sass_spec_options = YAML.load_file(scope("test/sass-spec.yml"))
-    enabled = sass_spec_options.delete(:enabled)
-    unless enabled
-      puts "SassSpec tests are disabled."
-      next
-    end
-    if ruby_version_at_least?("1.9.2")
-      old_load_path = $:.dup
+    old_load_path = $:.dup
+    begin
+      $:.unshift(File.join(File.dirname(__FILE__), "lib"))
       begin
-        $:.unshift(File.join(File.dirname(__FILE__), "lib"))
-        begin
-          require 'sass_spec'
-        rescue LoadError
-          puts "You probably forgot to run: bundle exec rake"
-          raise
-        end
-        default_options = {
-          :spec_directory => SassSpec::SPEC_DIR,
-          :engine_adapter => SassEngineAdapter.new,
-          :generate => false,
-          :tap => false,
-          :skip => false,
-          :verbose => false,
-          :filter => "",
-          :limit => -1,
-          :unexpected_pass => false,
-          :nuke => false,
-        }
-        SassSpec::Runner.new(default_options.merge(sass_spec_options)).run || exit(1)
-      ensure
-        $:.replace(old_load_path)
+        require 'sass_spec'
+      rescue LoadError
+        puts "You probably forgot to run: bundle exec rake"
+        raise
       end
-    else
-      "Skipping sass-spec on ruby versions less than 1.9.2"
+      SassSpec::Runner.new(
+        language_version: get_version[/^\d+\.\d+/],
+        spec_directory: SassSpec::SPEC_DIR,
+        engine_adapter: SassEngineAdapter.new,
+        generate: false,
+        tap: false,
+        skip: false,
+        verbose: false,
+        filter: "",
+        limit: -1,
+        unexpected_pass: false,
+        nuke: false,
+      ).run || exit(1)
+    ensure
+      $:.replace(old_load_path)
     end
   end
 end

doc-src/SASS_CHANGELOG.md

@@ -3,6 +3,10 @@
 * Table of contents
 {:toc}
 
+## 3.7.2 (Unreleased)
+
+* Fix more escaped-whitespace edge cases.
+
 ## 3.7.1 (7 November 2018)
 
 * Properly handle escaped whitespace and other unusual characters.

lib/sass/scss/css_parser.rb

@@ -47,7 +47,12 @@ def ruleset
       def keyframes_ruleset
         start_pos = source_position
         return unless (selector = keyframes_selector)
-        block(node(Sass::Tree::KeyframeRuleNode.new(selector.strip), start_pos), :ruleset)
+        block(
+          node(
+            Sass::Tree::KeyframeRuleNode.new(
+              Sass::Util.strip_except_escapes(selector)),
+            start_pos),
+          :ruleset)
       end
 
       @sass_script_parser = Sass::Script::CssParser

lib/sass/scss/parser.rb

@@ -992,8 +992,9 @@ def value!
         # This results in a dramatic speed increase.
         if (val = tok(STATIC_VALUE))
           # If val ends with escaped whitespace, leave it be.
-          val = val.lstrip.sub(/(?<!\\)\s*$/, '\1')
-          str = Sass::Script::Tree::Literal.new(Sass::Script::Value::String.new(val.strip))
+          str = Sass::Script::Tree::Literal.new(
+            Sass::Script::Value::String.new(
+              Sass::Util.strip_except_escapes(val)))
           str.line = start_pos.line
           str.source_range = range(start_pos)
           return str

lib/sass/selector/pseudo.rb

@@ -134,7 +134,7 @@ def to_s(opts = {})
         res = (syntactic_type == :class ? ":" : "::") + @name
         if @arg || @selector
           res << "("
-          res << @arg.strip if @arg
+          res << Sass::Util.strip_except_escapes(@arg) if @arg
           res << " " if @arg && @selector
           res << @selector.to_s(opts) if @selector
           res << ")"

lib/sass/tree/rule_node.rb

@@ -140,7 +140,8 @@ def try_to_parse_non_interpolated_rules
       # When we get it, we'll set it on the parsed rules if possible.
       parser = nil
       warnings = Sass.logger.capture do
-        parser = Sass::SCSS::StaticParser.new(@rule.join.strip, nil, nil, 1)
+        parser = Sass::SCSS::StaticParser.new(
+          Sass::Util.strip_except_escapes(@rule.join), nil, nil, 1)
         @parsed_rules = parser.parse_selector rescue nil
       end
 

lib/sass/tree/visitors/perform.rb

@@ -553,7 +553,7 @@ def run_interp_no_strip(text)
   end
 
   def run_interp(text)
-    run_interp_no_strip(text).strip
+    Sass::Util.strip_except_escapes(run_interp_no_strip(text))
   end
 
   def handle_import_loop!(node)

lib/sass/tree/visitors/to_css.rb

@@ -298,7 +298,7 @@ def visit_rule(node)
           rule_part.gsub!(/nth([^( ]*)\(([^)]*)\)/m) do |match|
             match.tr(" \t\n", "")
           end
-          rule_part.strip!
+          rule_part = Sass::Util.strip_except_escapes(rule_part)
         end
         rule_part
       end.compact.join(rule_separator)

lib/sass/util.rb

@@ -246,15 +246,15 @@ def substitute(ary, from, to)
       res
     end
 
-    # Destructively strips whitespace from the beginning and end
-    # of the first and last elements, respectively,
-    # in the array (if those elements are strings).
+    # Destructively strips whitespace from the beginning and end of the first
+    # and last elements, respectively, in the array (if those elements are
+    # strings). Preserves CSS escapes at the end of the array.
     #
     # @param arr [Array]
     # @return [Array] `arr`
     def strip_string_array(arr)
       arr.first.lstrip! if arr.first.is_a?(String)
-      arr.last.rstrip! if arr.last.is_a?(String)
+      arr[-1] = Sass::Util.rstrip_except_escapes(arr[-1]) if arr.last.is_a?(String)
       arr
     end
 
@@ -289,6 +289,24 @@ def escaped_char(escape)
       end
     end
 
+    # Like [String#strip], but preserves escaped whitespace at the end of the
+    # string.
+    #
+    # @param string [String]
+    # @return [String]
+    def strip_except_escapes(string)
+      rstrip_except_escapes(string.lstrip)
+    end
+
+    # Like [String#rstrip], but preserves escaped whitespace at the end of the
+    # string.
+    #
+    # @param string [String]
+    # @return [String]
+    def rstrip_except_escapes(string)
+      string.sub(/(?<!\\)\s+$/, '')
+    end
+
     # Return an array of all possible paths through the given arrays.
     #
     # @param arrs [Array<Array>]