Use Float.{to_string/1, to_charlist/1} when possible (#13898)

lib/elixir/lib/inspect.ex

@@ -387,7 +387,7 @@ defimpl Inspect, for: Float do
       if abs >= 1.0 and abs < 1.0e16 and trunc(float) == float do
         [Integer.to_string(trunc(float)), ?., ?0]
       else
-        :erlang.float_to_list(float, [:short])
+        Float.to_charlist(float)
       end
 
     color(IO.iodata_to_binary(formatted), :number, opts)

lib/elixir/lib/list/chars.ex

@@ -58,6 +58,6 @@ end
 
 defimpl List.Chars, for: Float do
   def to_charlist(term) do
-    :erlang.float_to_list(term, [:short])
+    Float.to_charlist(term)
   end
 end

lib/elixir/lib/string/chars.ex

@@ -57,6 +57,6 @@ end
 
 defimpl String.Chars, for: Float do
   def to_string(term) do
-    :erlang.float_to_binary(term, [:short])
+    Float.to_string(term)
   end
 end