text: Title: Backslash preventing newline in documentation can form escape sequence like `\n`
  Body: When suite, test or keyword documentation is split to multiple rows, rows are automatically joined together with a newline. This isn't always desirable so it's possible to use `\` at the end of a documentation row to prevent it:
  ```robotframework
  *** Settings ***
  Documentation    Backslash avoids automatic \
  ...              newline.
  ```
  
  The problem is that lines are joined together so that the above looks like `Backslash avoids automatic \newline` and when it is later evaluated the accidental `\n` actually creates a newline. This can be fixed so that backslashes used for preventing newlines are removed from the documentation before rows are joined together.
  
  This is a pretty annoying bug, but luckily there are very seldom needs to prevent the automatic newline. For example, in the above case the documentation in log and report looks exactly the same when formatted as a HTML paragraph. The main use case for splitting lines without an automatic newline is splitting strings that don't even have spaces in them and such strings are rare in documentation.