[docs] Correction in PYTHON 3 Doc tutorial.pdf

Hi team, I downloaded the doc from below URL: https://docs.python.org/3/download.html PDF (A4 paper size) Download <https://docs.python.org/3/archives/python-3.5.1-docs-pdf-a4.zip> (ca. 8 MB) I downloaded the packed as .zip file & unzipped it and started with docs-pdf/tutorial.pdf 3.1.3 Lists: At page No: 12 letters[2:5] = ['C', 'D', 'E'] should be corrected to letters[2:4] = ['C', 'D', 'E'] Thanks, Amir Malik, Mobile: +91-9971509933