Made more direct and concise

The guide is opinionated, and that's ok.

docs/writing/structure.rst

@@ -91,7 +91,7 @@ environment, or your project's internal modules.
 
 To keep in line with the style guide, keep module names short, lowercase, and
 be sure to avoid using special symbols like the dot (.) or question mark (?).
-So a file name like `my.spam.py` is one you should try to avoid! Naming this way 
+So a file name like `my.spam.py` is one you should avoid! Naming this way 
 will interfere with the way python looks for modules.
 
 In this example python expects to find a "spam.py" file in a folder named "my"