[ADF-4152] Updated folder structure of core docs (#4415)

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Manual fixes to core doc file links

* [ADF-4152] Further automatic + manual link tidying

docs/core/pipes/format-space.pipe.md

@@ -0,0 +1,32 @@
+---
+Title: Format Space pipe
+Added: v3.0.0
+Status: Active
+Last reviewed: 2018-11-27
+---
+
+# [Format Space pipe](../../../lib/core/pipes/format-space.pipe.ts "Defined in format-space.pipe.ts")
+
+Replaces all the white space in a string with a supplied character.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div [id]="'CHECK MY ID' | formatSpace">
+    BATTLESTAR GALACTICA
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe replaces each run of whitespace characters in the string with a single character
+(which is the underscore by default) and transforms the string to lowercase (eg, `test a pipe`
+becomes `test_a_pipe`).
+
+You can specify a different replacement character by passing it as a pipe parameter.
+You can also pass `false` to the `lowercase` parameter to skip the conversion to lowercase
+and just replace the whitespace.