Updated README, aligned return value with other API functions.

README.md

@@ -403,3 +403,9 @@ Returns self (the Squire instance).
 Decreases by 1 the nesting level of any at-least-partially selected blocks which are part of a list.
 
 Returns self (the Squire instance).
+
+### removeAllFormatting
+
+Removes all formatting from the selection. Block elements (list items, table cells, etc.) are kept as separate blocks.
+
+Returns self (the Squire instance).

build/squire-raw.js

@@ -3715,6 +3715,8 @@ proto.removeAllFormatting = function ( range ) {
     } );
 
     this.setSelection( this._getRangeAndRemoveBookmark() );
+
+    return this;
 };
 
 proto.increaseQuoteLevel = command( 'modifyBlocks', increaseBlockQuoteLevel );

source/Editor.js

@@ -2257,6 +2257,8 @@ proto.removeAllFormatting = function ( range ) {
     } );
 
     this.setSelection( this._getRangeAndRemoveBookmark() );
+
+    return this;
 };
 
 proto.increaseQuoteLevel = command( 'modifyBlocks', increaseBlockQuoteLevel );