The variable scope in the Go templates makes it hard, if possible at all, to write templates with counter variables or similar state.
This commit fixes that by adding a writable context to Node, backed by a map: Scratch.
This context has three methods, Get, Set and Add. The Add is tailored for counter variables, but can be used for any built-in numeric values or strings.
Added the new general module's test file, general_test.go. This replaces the
helpers_test.go file.
There is also a minor defect fix in general.go's StripHTML function.
The correct xhtml tag for a break is <br /> not </br>. I've also removed
the unnecessary spaces before the replacement "\n".
The new test module also reflects this change.
Conflicts:
helpers/general.go
