Fix for String#chomp changes (related to crystal-lang#3704)

src/compiler/crystal/tools/expand.cr

@@ -14,11 +14,11 @@ module Crystal
       expansions.try &.each_with_index do |expansion, i|
         io.puts "expansion #{i + 1}:"
         io << "   "
-        io.puts expansion.original.lines.join "   "
+        io.puts expansion.original.lines(chomp: false).join "   "
         io.puts
         expansion.expandeds.each_with_index do |expanded, j|
           io << "~> "
-          io.puts expanded.lines.join "   "
+          io.puts expanded.lines(chomp: false).join "   "
           io.puts
         end
       end
@@ -38,7 +38,7 @@ module Crystal
       s = node.to_s
       return s unless node.is_a?(MacroIf) || node.is_a?(MacroFor)
       indent = node.location.not_nil!.column_number - 1
-      s.lines.map do |line|
+      s.lines(chomp: false).map do |line|
         i = 0
         line.each_char do |c|
           break unless c == ' ' && i < indent