String gap fails for some chars

String gap fails with "error in character literal" 
when the first char on the new line after the '\' is
not alphanumeric (I think; I haven't done a detailed 
study).  For example, this is okay:

    "jkaehfjhsdg\
    \hgshgt"

but this is not:

    "kjsdhgkjhrtht\
    \(kjsdhkghgh"

I've attached a program with three putStrLns.  The 
first fail under 4.08.2; the last succeeds.

Trac metadata

Trac field	Value
Version	None
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedWorksForMe
Component	Compiler
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