Fixing unfortunate editing mishap. This reverts the last remaining test...

Fixing unfortunate editing mishap. This reverts the last remaining test manipulation in commit 249df7cb and makes all existing unit tests pass with smart_holder as default holder.

include/pybind11/detail/init.h

@@ -162,8 +162,7 @@ void construct(value_and_holder &v_h, Cpp<Class> &&result, bool need_alias) {
 // return-by-value version 2: returning a value of the alias type itself.  We move-construct an
 // Alias instance (even if no the python-side inheritance is involved).  The is intended for
 // cases where Alias initialization is always desired.
-template <typename Class,
-          detail::enable_if_t<!detail::is_smart_holder_type_caster<Cpp<Class>>::value, int> = 0>
+template <typename Class>
 void construct(value_and_holder &v_h, Alias<Class> &&result, bool) {
     static_assert(std::is_move_constructible<Alias<Class>>::value,
         "pybind11::init() return-by-alias-value factory function requires a movable alias class");

tests/test_factory_constructors.py

@@ -177,10 +177,10 @@ def test_init_factory_alias():
     assert f.has_alias()
 
     assert ConstructorStats.detail_reg_inst() == n_inst + 6
-    assert [i.alive() for i in cstats] in ([6, 4], [6, 2])  # SMART_HOLDER_WIP
+    assert [i.alive() for i in cstats] == [6, 4]
 
     del a, b, e
-    assert [i.alive() for i in cstats] in ([3, 3], [3, 2])  # SMART_HOLDER_WIP
+    assert [i.alive() for i in cstats] == [3, 3]
     assert ConstructorStats.detail_reg_inst() == n_inst + 3
     del f, c, d
     assert [i.alive() for i in cstats] == [0, 0]
@@ -214,10 +214,10 @@ def test_init_factory_alias():
     assert [i.alive() for i in cstats] == [0, 0]
     assert ConstructorStats.detail_reg_inst() == n_inst
 
-    line1 = ["1", "8", "3", "4", "5", "6", "123", "10", "47"]
-    line2 = ["hi there", "3", "4", "6", "move", "123", "why hello!", "move", "47"]
-    line2b = line2[:-2] + ["move", "10"] + line2[-2:]  # SMART_HOLDER_WIP
-    assert [i.values() for i in cstats] in ([line1, line2], [line1, line2b])
+    assert [i.values() for i in cstats] == [
+        ["1", "8", "3", "4", "5", "6", "123", "10", "47"],
+        ["hi there", "3", "4", "6", "move", "123", "why hello!", "move", "47"],
+    ]
 
 
 def test_init_factory_dual():