Make the Haml parser a little more flexible.

lib/haml/engine.rb

@@ -73,7 +73,8 @@ module Haml
         raise Haml::Error, "Invalid format #{@options[:format].inspect}"
       end
 
-      @template = template.rstrip + "\n-#\n-#"
+      @template = (template.rstrip + "\n-#\n-#").split(/\r\n|\r|\n/)
+      @template_index = 0
       @to_close_stack = []
       @output_tabs = 0
       @template_tabs = 0

lib/haml/precompiler.rb

@@ -113,10 +113,7 @@ END
 
     def precompile
       old_line = Line.new
-      @template.split(/\r\n|\r|\n/).each_with_index do |text, index|
-        line = Line.new text.strip, text.lstrip.chomp, index
-        line.spaces, line.tabs = count_soft_tabs(text)
-
+      while line = next_line
         if line.text.empty?
           process_indent(old_line) if flat? && !old_line.text.empty?
 
@@ -713,6 +710,23 @@ END
       @block_opened = false
     end
 
+    def raw_next_line
+      text = @template.shift
+      return unless text
+
+      index = @template_index
+      @template_index += 1
+
+      return text, index
+    end
+
+    def next_line
+      text, index = raw_next_line
+      return unless text
+
+      Line.new text.strip, text.lstrip.chomp, index, *count_soft_tabs(text)
+    end
+
     def contains_interpolation?(str)
       str.include?('#{')
     end