Update base/file.jl

Co-authored-by: Cody Tapscott <84105208+topolarity@users.noreply.github.com>

base/file.jl

@@ -994,7 +994,7 @@ object will be 0 (`UV_DIRENT_UNKNOWN`) and [`isfile`](@ref) etc. will fall back
 
 ```julia
 for obj in _readdirx()
-    isfile(obj) && println("$(obj.name) is a file with path $(obj.path)")
+    isfile(obj) && println("\$(obj.name) is a file with path \$(obj.path)")
 end
 ```
 """