[sv-ec] Eratta: String Methods Should be Functions not Tasks?

The LRM 3.1a appears to define all methods of the data type "string" as
tasks.  For example:

3.7.11 itoa()
task itoa(integer i)

3.7.12 hextoa()
task hextoa(integer i)

3.7.13 octtoa()
task octtoa(integer i)

As tasks they cannot be called by other functions.  Such data manipulation
methods should never block so shouldn't they be void functions instead?