fix #39426, at-which not working with .. function (#39446)

(cherry picked from commit 927c24f)

Author: JeffBezanson

stdlib/InteractiveUtils/src/macros.jl

@@ -42,7 +42,7 @@ function gen_call_with_extracted_types(__module__, fcn, ex0, kws=Expr[])
             insert!(args, (isnothing(i) ? 2 : i+1), ex0.args[2])
             ex0 = Expr(:call, args...)
         end
-        if ex0.head === :. || (ex0.head === :call && string(ex0.args[1])[1] == '.')
+        if ex0.head === :. || (ex0.head === :call && ex0.args[1] !== :.. && string(ex0.args[1])[1] == '.')
             codemacro = startswith(string(fcn), "code_")
             if codemacro && ex0.args[2] isa Expr
                 # Manually wrap a dot call in a function

stdlib/InteractiveUtils/test/runtests.jl

@@ -252,6 +252,10 @@ const curmod_str = curmod === Main ? "Main" : join(curmod_name, ".")
 @test (@which Int[1; 2]).name === :typed_vcat
 @test (@which [1 2;3 4]).name === :hvcat
 @test (@which Int[1 2;3 4]).name === :typed_hvcat
+# issue #39426
+let x..y = 0
+    @test (@which 1..2).name === :..
+end
 
 # issue #13464
 try

stdlib/Test/src/Test.jl

@@ -1404,7 +1404,7 @@ function _inferred(ex, mod, allow = :(Union{}))
     end
     Meta.isexpr(ex, :call)|| error("@inferred requires a call expression")
     farg = ex.args[1]
-    if isa(farg, Symbol) && first(string(farg)) == '.'
+    if isa(farg, Symbol) && farg !== :.. && first(string(farg)) == '.'
         farg = Symbol(string(farg)[2:end])
         ex = Expr(:call, GlobalRef(Test, :_materialize_broadcasted),
             farg, ex.args[2:end]...)