add @nospecialize for identity (#44929)

Tokazama · web-flow · commit 1fe7cfa35ae9 · 2022-04-11T12:10:32.000-04:00
diff --git a/base/operators.jl b/base/operators.jl
@@ -510,7 +510,7 @@ julia> identity("Well, what did you expect?")
 "Well, what did you expect?"
 ```
 """
-identity(x) = x
+identity(@nospecialize x) = x
 
 +(x::Number) = x
 *(x::Number) = x
