Reword note in the documentation

Co-authored-by: Max Horn <max@quendi.de>

lib/test.gi

@@ -351,7 +351,7 @@ end);
 ##  is used if and only if <C>EXPR</C> evaluated to <K>false</K>. Finally,
 ##  once <C>#fi</C> is reached, evaluation continues normally.
 ##  <P/>
-##  Note that <C>EXPR</C> is evaluated after the lines marked with <C>#@exec</C> but before
+##  Note that <C>EXPR</C> is evaluated after all <C>#@exec</C> lines have been executed but before
 ##  any tests are run. Thus, it cannot depend on test results or packages loaded in tests,
 ##  but it can depend on packages loaded via <C>#@exec</C>.
 ##  </Item>