Fix spelling error. (#14123)

docs/source/interactive/tutorial.rst

@@ -120,7 +120,7 b" IPython has a set of predefined 'magic functions' that you can call with a"
 command line style syntax.  There are two kinds of magics, line-oriented and
 cell-oriented.  **Line magics** are prefixed with the ``%`` character and work
 much like OS command-line calls: they get as an argument the rest of the line,
-where arguments are passed without parentheses or quotes. **Lines magics** can
+where arguments are passed without parentheses or quotes. **Line magics** can
 return results and can be used in the right hand side of an assignment.  **Cell
 magics** are prefixed with a double ``%%``, and they are functions that get as
 an argument not only the rest of the line, but also the lines below it in a