usage: rst_inc.py replace [-h] [-s [source]] [-t [target]]
                          [-se [source encoding]] [-te [target encoding]]
                          old new [count]

positional arguments:
  old                   old
  new                   new
  count                 count

optional arguments:
  -h, --help            show this help message and exit
  -s [source], --source [source]
                        default: stdin
  -t [target], --target [target]
                        default: stdout
  -se [source encoding], --source_encoding [source encoding]
                        default: utf-8-sig
  -te [target encoding], --target_encoding [target encoding]
                        default: utf-8
