doc: Add a generic template for text only tests

tests/examples/text/template.lua

@@ -0,0 +1,19 @@
+local file_path, _, luacovpath = ...
+
+-- Set the global shims
+-- luacheck: globals awesome root tag screen client mouse drawin
+awesome = require( "awesome" )
+root    = require( "root"    )
+tag     = require( "tag"     )
+screen  = require( "screen"  )
+client  = require( "client"  )
+mouse   = require( "mouse"   )
+drawin  = require( "drawin"  )
+
+-- If luacov is available, use it. Else, do nothing.
+pcall(function()
+    require("luacov.runner")(luacovpath)
+end)
+
+-- Execute the test
+loadfile(file_path)()