Clearing gutter on last side when disabled with negative margin on track

src/concerns/gutters.coffee

@@ -16,14 +16,20 @@ export default
 		makeBreakpointSlideGutterStyle: (breakpoint) ->
 			gutter = @getResponsiveValue 'gutter', breakpoint
 
-			# If carousel would be disabled for not having enough slides, then remove
-			# gutter from last slide.
-			notLastSlide = if @isDisabledAtBreakpoint breakpoint
-			then ':not(:last-child)' else ''
+			# If carousel would be disabled for not having enough slides, then
+			# effectively remove the gutter from the last slide.  Using a negative
+			# margin on the track so that we don't increase the specifity on the
+			# slide style, like would be the case if adding :not(:last-child) to the
+			# slide.
+			clearGutter = """
+				#{@scopeSelector} .ssr-carousel-track {
+					margin-right: calc(#{@autoUnit(gutter)} * -1);
+				}
+			""" if @isDisabledAtBreakpoint breakpoint
 
 			# Render styles
 			"""
-			#{@scopeSelector} .ssr-carousel-slide#{notLastSlide} {
+			#{@scopeSelector} .ssr-carousel-slide {
 				margin-right: #{@autoUnit(gutter)};
 			}
 			"""