Update Doc/library/stdtypes.rst

Co-authored-by: Stan Ulbrych <stan@python.org>

Author: hu-jeff

Doc/library/stdtypes.rst

@@ -3119,7 +3119,7 @@ String objects have one unique built-in operation: the ``%`` operator (modulo).
 This is also known as the string *formatting* or *interpolation* operator.
 Given ``format % values`` (where *format* is a string), ``%`` conversion
 specifications in *format* are replaced with zero or more elements of *values*.
-The effect is similar to using :c:func:`sprintf` in the C language.
+The effect is similar to using the :c:func:`sprintf` function in the C language.
 For example:
 
 .. doctest::