incorrect CALL syntax is sometimes emitted without diagnostic

[weatherhead99]

in the archon clocking language the following is the valid construct for a conditional:

if param CALL func(n)

which comes from a WDL construct like:

if param func(n)

(the actual keyword CALL is inserted by WDL). However, if one (knowing the archon clock language) accidentally types

if param CALL func(n)
into a WDL file, the resulting line is generated:

if param CALL CALL func(n)
this then fails when it gets loaded into archon.

Would be nice if we could trap that error at the wdl stage.