Revert "fix warning about unnecessary parentheses in boxed_inline"

This reverts commit daffb6d.

It broke API.

glib/src/boxed_inline.rs

@@ -13,15 +13,15 @@ macro_rules! glib_boxed_inline_wrapper {
         #[repr(transparent)]
         $visibility struct $name $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? {
             pub(crate) inner: $ffi_name,
-            $(pub(crate) phantom: std::marker::PhantomData<$($generic),+>,)?
+            pub(crate) phantom: std::marker::PhantomData<($($($generic),+)?)>,
         }
 
         impl $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? std::clone::Clone for $name $(<$($generic),+>)? {
             #[inline]
             fn clone(&self) -> Self {
                 Self {
                     inner: std::clone::Clone::clone(&self.inner),
-                    $(phantom: std::marker::PhantomData::<$($generic),+>)?
+                    phantom: std::marker::PhantomData,
                 }
             }
         }
@@ -45,15 +45,15 @@ macro_rules! glib_boxed_inline_wrapper {
         #[repr(transparent)]
         $visibility struct $name $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? {
             pub(crate) inner: $ffi_name,
-            $(pub(crate) phantom: std::marker::PhantomData<$($generic),+>,)?
+            pub(crate) phantom: std::marker::PhantomData<($($($generic),+)?)>,
         }
 
         impl $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? std::clone::Clone for $name $(<$($generic),+>)? {
             #[inline]
             fn clone(&self) -> Self {
                 Self {
                     inner: std::clone::Clone::clone(&self.inner),
-                    $(phantom: std::marker::PhantomData::<$($generic),+>)?
+                    phantom: std::marker::PhantomData,
                 }
             }
         }
@@ -76,7 +76,7 @@ macro_rules! glib_boxed_inline_wrapper {
         #[repr(transparent)]
         $visibility struct $name $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? {
             pub(crate) inner: $ffi_name,
-            $(pub(crate) phantom: std::marker::PhantomData<$($generic),+>,)?
+            pub(crate) phantom: std::marker::PhantomData<($($($generic),+)?)>,
         }
 
         impl $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? std::clone::Clone for $name $(<$($generic),+>)? {
@@ -116,7 +116,7 @@ macro_rules! glib_boxed_inline_wrapper {
         #[repr(transparent)]
         $visibility struct $name $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? {
             pub(crate) inner: $ffi_name,
-            $(pub(crate) phantom: std::marker::PhantomData<$($generic),+>,)?
+            pub(crate) phantom: std::marker::PhantomData<($($($generic),+)?)>,
         }
 
         impl $(<$($generic $(: $bound $(+ $bound2)*)?),+>)? std::clone::Clone for $name $(<$($generic),+>)? {
@@ -164,7 +164,7 @@ macro_rules! glib_boxed_inline_wrapper {
                 init(v.as_mut_ptr());
                 Self {
                     inner: v.assume_init(),
-                    $(phantom: std::marker::PhantomData::<$($generic),+>)?
+                    phantom: std::marker::PhantomData,
                 }
             }
         }
@@ -174,7 +174,7 @@ macro_rules! glib_boxed_inline_wrapper {
             unsafe fn unsafe_from(t: $ffi_name) -> Self {
                 Self {
                     inner: t,
-                    $(phantom: std::marker::PhantomData::<$($generic),+>)?
+                    phantom: std::marker::PhantomData,
                 }
             }
         }
@@ -372,7 +372,7 @@ macro_rules! glib_boxed_inline_wrapper {
 
                 $crate::translate::Borrowed::new(Self {
                     inner: std::ptr::read(ptr),
-                    $(phantom: std::marker::PhantomData::<$($generic),+>)?
+                    phantom: std::marker::PhantomData,
                 })
             }
         }