Practice exercise prerequisites & practices tags

concepts/basics/about.md

@@ -126,6 +126,7 @@ x = "foo"  #this is an in-line comment
 
 The first statement of a function body can optionally be a [_docstring_][docstring], which concisely summarizes the function or object's purpose. These docstrings are read by automated documentation tools, and are returned by calling **doc** on the function, method, or class. . They are recommended for programs of any size where documentation is needed:
 
+
 ```python
 #an example on a user-defined function
 def number_to_the_power_of(number_one, number_two):

concepts/basics/introduction.md

@@ -6,6 +6,7 @@ Python puts a strong emphasis on code readability and (_similar to Haskell_) use
 
 ## Getting Started
 
+
 Objects are [assigned][assignment statements] to [names][naming and binding] in Python via the `=` or _assignment operator_. [Variables][variables] are written in [`snake_case`][snake case], and _constants_ usually in `SCREAMING_SNAKE_CASE`. A name (_variable or constant_) is not itself _typed_, and can be attached or re-attached to different objects over its lifetime. For extended naming conventions and advice, see [PEP 8][pep8].
 
 ```python
@@ -18,6 +19,7 @@ Objects are [assigned][assignment statements] to [names][naming and binding] in
 
 Constants are usually defined on a [module][module] or _global_ level, and although they _can_ be changed, they are _intended_ to be named only once. Their `SCREAMING_SNAKE_CASE` is a message to other developers that the assignment should not be altered:
 
+
 ```python
 # All caps signal that this is intended as a constant
 MY_FIRST_CONSTANT = 16