Fix parsing of multiline URL values for rule sets

Author: gmcgibbon

lib/css_parser/rule_set.rb

@@ -616,7 +616,7 @@ def parse_declarations!(block) # :nodoc:
         decs = (continuation ? continuation + decs : decs)
         if decs =~ /\([^)]*\Z/ # if it has an unmatched parenthesis
           continuation = "#{decs};"
-        elsif (matches = decs.match(/\s*(.[^:]*)\s*:\s*(.+?)(?:;?\s*\Z)/i))
+        elsif (matches = decs.match(/\s*(.[^:]*)\s*:\s*(?m:(.+))(?:;?\s*\Z)/i))
           # skip end_of_declaration
           property = matches[1]
           value = matches[2]

test/test_css_parser_misc.rb

@@ -113,6 +113,26 @@ def test_ignoring_malformed_declarations
     end
   end
 
+  def test_multiline_declarations
+    css = <<-CSS
+      @font-face {
+        font-family: 'some_font';
+        src: url(https://example.com/font.woff2) format('woff2'),
+             url(https://example.com/font.woff) format('woff');
+        font-style: normal;
+      }
+    CSS
+
+    @cp.add_block!(css)
+    @cp.each_selector do |selector, declarations, _spec|
+      assert_equal '@font-face', selector
+      assert_equal "font-family: 'some_font'; " \
+                   "src: url(https://example.com/font.woff2) format('woff2')," \
+                        "url(https://example.com/font.woff) format('woff'); " \
+                   "font-style: normal;", declarations
+    end
+  end
+
   def test_find_rule_sets
     css = <<-CSS
       h1, h2 { color: blue; }