Moved order of evaluation into the Specification section, since it's guaranteed.

pep-0498.txt

@@ -360,6 +360,25 @@ Leading and trailing whitespace in expressions is skipped
 For ease of readability, leading and trailing whitespace in
 expressions is ignored.
 
+Evaluation order of expressions
+-------------------------------
+
+The expressions in an f-string are evaluated in left-to-right
+order. This is detectable only if the expressions have side effects::
+
+  >>> def fn(l, incr):
+  ...    result = l[0]
+  ...    l[0] += incr
+  ...    return result
+  ...
+  >>> lst = [0]
+  >>> f'{fn(lst,2)} {fn(lst,3)}'
+  '0 2'
+  >>> f'{fn(lst,2)} {fn(lst,3)}'
+  '5 7'
+  >>> lst
+  [10]
+
 Discussion
 ==========
 
@@ -602,25 +621,6 @@ having 2 expressions::
 
   f'{x:.{width}}'
 
-Evaluation order of expressions
--------------------------------
-
-The expressions in an f-string are evaluated in left-to-right
-order. This is detectable only if the expressions have side effects::
-
-  >>> def fn(l, incr):
-  ...    result = l[0]
-  ...    l[0] += incr
-  ...    return result
-  ...
-  >>> lst = [0]
-  >>> f'{fn(lst,2)} {fn(lst,3)}'
-  '0 2'
-  >>> f'{fn(lst,2)} {fn(lst,3)}'
-  '5 7'
-  >>> lst
-  [10]
-
 Expressions used multiple times
 -------------------------------