how-tos made with markdown snippet injector

apps/tests/text/formatted-string.md

@@ -0,0 +1,11 @@
+---
+nav-title: "Formatted String How-To"
+title: "How-To"
+description: "Examples for using Formatted String"
+---
+# Formatted String
+Using a formatted string requires loading formatted-string and span module.
+<snippet id='formatted-string-require'/>
+
+### How to set formatted text content for a label
+<snippet id='formatted-string-set'/>