Fixed nested list rendering on GitHub for readme contents

Author: Bilge

README.md

@@ -22,26 +22,26 @@ Contents
   1. [Strategies](#strategies)
   1. [Practical example](#practical-example)
   1. [Strategy reference](#strategy-reference)
-    1. [Copy](#copy)
-    1. [CopyContext](#copycontext)
-    1. [CopyKey](#copykey)
-    1. [Callback](#callback)
-    1. [Collection](#collection)
-    1. [Context](#context)
-    1. [Either](#either)
-    1. [Filter](#filter)
-    1. [Flatten](#flatten)
-    1. [IfElse](#ifelse)
-    1. [IfExists](#ifexists)
-    1. [Join](#join)
-    1. [Merge](#merge)
-    1. [TakeFirst](#takefirst)
-    1. [ToList](#tolist)
-    1. [Translate](#translate)
-    1. [TryCatch](#trycatch)
-    1. [Type](#type)
-    1. [Unique](#unique)
-    1. [Walk](#walk)
+      1. [Copy](#copy)
+      1. [CopyContext](#copycontext)
+      1. [CopyKey](#copykey)
+      1. [Callback](#callback)
+      1. [Collection](#collection)
+      1. [Context](#context)
+      1. [Either](#either)
+      1. [Filter](#filter)
+      1. [Flatten](#flatten)
+      1. [IfElse](#ifelse)
+      1. [IfExists](#ifexists)
+      1. [Join](#join)
+      1. [Merge](#merge)
+      1. [TakeFirst](#takefirst)
+      1. [ToList](#tolist)
+      1. [Translate](#translate)
+      1. [TryCatch](#trycatch)
+      1. [Type](#type)
+      1. [Unique](#unique)
+      1. [Walk](#walk)
   1. [Requirements](#requirements)
   1. [Limitations](#limitations)
   1. [Testing](#testing)