Break out m.sync removal, it's important

docs/v1.x-migration.md

@@ -17,6 +17,7 @@
 - [Accessing route params](#accessing-route-params)
 - [Preventing unmounting](#preventing-unmounting)
 - [`m.request`](#mrequest)
+- [`m.sync` removed](#msync-removed)
 - [`xlink` namespace required](#xlink-namespace-required)
 - [Nested arrays in views](#nested-arrays-in-views)
 - [`vnode` equality checks](#vnode-equality-checks)
@@ -25,7 +26,7 @@
 
 ## `m.prop` removed
 
-In `v1.x`, `m.prop` is now a more powerful stream micro-library, but it's no longer part of core.
+In `v1.x`, `m.prop()` is now a more powerful stream micro-library, but it's no longer part of core.
 
 ### `v0.2.x`
 
@@ -475,7 +476,13 @@ setTimeout(function() {
 }, 1000)
 ```
 
-The equivalent of `m.sync` is now `Promise.all`
+Additionally, if the `extract` option is passed to `m.request` the return value of the provided function will be used directly to resolve its promise, and the `deserialize` callback is ignored.
+
+---
+
+## `m.sync` removed
+
+`m.sync` has been removed in favor of `Promise.all`
 
 ### `v0.2.x`
 
@@ -501,8 +508,6 @@ Promise.all([
 })
 ```
 
-Additionally, if the `extract` option is passed to `m.request` the return value of the provided function will be used directly to resolve its promise, and the `deserialize` callback is ignored.
-
 ---
 
 ## `xlink` namespace required