Merge pull request #23467 from JuliaLang/kf/docexample

Update conditional documentation example

Author: Keno

doc/src/manual/documentation.md

@@ -254,13 +254,13 @@ Documentation written in non-toplevel blocks, such as `begin`, `if`, `for`, and
 added to the documentation system as blocks are evaluated. For example:
 
 ```julia
-if VERSION > v"0.5"
+if condition()
     "..."
     f(x) = x
 end
 ```
 
-will add documentation to `f(x)` when the condition is `true`. Note that even if `f(x)` goes
+will add documentation to `f(x)` when `condition()` is `true`. Note that even if `f(x)` goes
 out of scope at the end of the block, its documentation will remain.
 
 ### Dynamic documentation