Finish log-draft

## The log function

The `log` statement logs the string represenation of given arguments to the

The `log` function logs a string represenation of given arguments to the

logging stream associated with the current component.

**Syntactical Structure**

[string representation] is logged to the logging stream associated with the

current component.

> NOTE: The implementation of the logging stream is outside the scope of

> this document.

> side effects on the test behaviour. In particular, functions used in a log

> statement should not (explicitly or implicitly) change component variable

> values, port or timer status.

The following string representations are recommended:

| Language Element | What is logged |

|------------------|----------------|

|Concrete value| the value itself|

|Uninitialized value| "UNINITIALIZED"|

|Component reference|actual state and, if available, component instance name|

|Port reference|actual port state|

|Timer reference|actual time state|

|Default reference|actual default state|