Fix typing errors in before-we-start

[rodrigarc]

Hi,

I was going through the lesson to find potential errors that could be fixed with the writing itself. I came across only a few, which shows how good this lesson is. I am creating the issue before forking anything to first check if they are worth changing or not. I had time to go only through one Rmarkdown in detail though.

1. File `00-before-we-start.Rmd'

   • Line 225, change verb form to infinitive: change Later, when you start create more to Later, when you start to create more
   • Line 290, add comma: change by typing, copy-pasting or sent from the script editor to by typing, copy-pasting, or sent from the script editor
   • Line 313, add preposition: use the help panel to search help directly to use the help panel to search for help directly
   • Line 325, move comma: change to complete function's argument names, object, names and file names to to complete function's argument names, object names, and file names
   • Line 363, add comma: change In that case it might help to to In that case, it might help to
   • Line 464, misspelled word: change useful R packages and tipps to useful R packages and tips