Fix redirection

basics/index.md

@@ -1,3 +0,0 @@
----
-redirect_to: /basics/introduction
----

basics/introduction.md

@@ -1,6 +1,7 @@
 ---
 title: Introduction
 description: An overview of objects, tags, and filters in the Liquid template language.
+redirect_from: /basics/
 ---
 
 Liquid code can be categorized into [**objects**](#objects), [**tags**](#tags), and [**filters**](#filters).

filters/abs.md

@@ -1,6 +1,7 @@
 ---
 title: abs
 description: Liquid filter that gets the absolute value of a number.
+redirect_from: /filters/
 ---
 
 Returns the absolute value of a number.

filters/index.md

@@ -1,3 +0,0 @@
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-redirect_to: /filters/abs
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tags/control-flow.md

@@ -1,6 +1,7 @@
 ---
 title: Control flow
 description: An overview of control flow and conditional tags in the Liquid template language.
+redirect_from: /tags/
 ---
 
 Control flow tags can change the information Liquid shows using programming logic.

tags/index.md

@@ -1,3 +0,0 @@
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-redirect_to: /tags/control-flow
----