text: Title: Make keywords and control structures in log look more like original data
  Body: Currently keywords and control structures are formatted differently in the log file than they look in the data. For example, you have a keyword call like
  ```
  Log Many    a    b    c
  ```
  and a FOR loop like
  ```
  FOR    ${x}    IN    cat    dog    horse
  ```
  in the data, they look like
  ```
  KEYWORD  BuiltIn.Log Many a, b, c
  ```
  and
  ```
  FOR  ${x} IN [ cat | dog | horse ]
  ```
  in the log file.
  
  I believe this should be changed. Most importantly, we should use the normal four space separator between items and omit all markers that wouldn't be supported in the data. The above examples could look like
  ```
  KEYWORD  BuiltIn.Log Many    a    b    c
  ```
  and
  ```
  FOR    ${x}    IN    cat    dog    horse
  ```
  
  
  