highlight the indentation level in Emacs buffers

 This package provides two Emacs minor modes:
 .
 * highlight-indentation-mode displays guides at each indentation
   level
 * highlight-indentation-current-column-mode displays guides
   indicating other lines indented to the same level as the line
   containing point
 .
 These modes are useful for programming in language like Python which
 use semantic indentation.