Changelog, minor: merge duplicating JS sections

ChangeLog.md

@@ -9,11 +9,6 @@
 
 ### Compiler
 
-### JS
-
-- Improve performance of maps and sets
-- [`KT-10931`](https://youtrack.jetbrains.com/issue/KT-10931) JS: Incorrect inlining of library method with optional parameters
-
 #### Analysis & diagnostics
 
 - Combination of 'open' and 'override' is no longer a warning
@@ -318,14 +313,17 @@
 
 ### JS
 
+- Improve performance of maps and sets
+
 ###### Issues fixed:
-- [`KT-6942`](https://youtrack.jetbrains.com/issue/KT-6942) generate structural equality check (i.e. `Any.equals`) instead of referential check (===) value equality patterns in `when`
+- [`KT-6942`](https://youtrack.jetbrains.com/issue/KT-6942) Generate structural equality check (i.e. `Any.equals`) instead of referential check (===) value equality patterns in `when`
 - [`KT-7228`](https://youtrack.jetbrains.com/issue/KT-7228) Wrong AbstractList signature
 - [`KT-8299`](https://youtrack.jetbrains.com/issue/KT-8299) Wrong access to private member in autogenerated code in data class
 - [`KT-11346`](https://youtrack.jetbrains.com/issue/KT-11346) Reified functions like `filterIsInstance` are now available in JS Standard Library
 - [`KT-12305`](https://youtrack.jetbrains.com/issue/KT-12305) Incorrect translation of `vararg` in `@native` functions
 - [`KT-12254`](https://youtrack.jetbrains.com/issue/KT-12254) JsEmptyExpression in initializer when compiling code like `val x = throw Exception()`
-- [`KT-11960`](https://youtrack.jetbrains.com/issue/KT-11960) JS: wrong code generated when a method of a local class calls constructor of the class
+- [`KT-11960`](https://youtrack.jetbrains.com/issue/KT-11960) Wrong code generated when a method of a local class calls constructor of the class
+- [`KT-10931`](https://youtrack.jetbrains.com/issue/KT-10931) Incorrect inlining of library method with optional parameters
 
 ### Tools