Merge pull request #554 from btovar/issue_527

Issue 527: do not use word processors

Author: btovar

episodes/01-short-introduction-to-Python.md

@@ -176,6 +176,12 @@ Notice that "Data Carpentry" is printed only once.
 lesson, we will introduce methods and user-defined functions. The Python
 documentation is excellent for reference on the differences between them.
 
+**Tip**: When editing scripts like *example.py*, be careful not to use word
+processors such as MS Word, as they may introduce extra information that
+confuses Python. In this lesson we will be using either Jupyter notebooks or
+the Spyder IDE, and for your everday work you may also choose any text editor
+such as Notepad++, VSCode, Vim, or Emacs.
+
 ### Operators
 
 We can perform mathematical calculations in Python using the basic operators