D4 parser internal failure - whitespace sensitivity

[duncand]

The D4 parser as seen from Dataphoria is sensitive to whitespace differences where it shouldn't be.

create operator Foo() : Integer begin result := 42; end;

If this is executed (all on one line as given), the parser dies with an internal exception:

ArgumentOutOfRangeException --->
Index and length must refer to a location within the string.
Parameter name: length
---- Stack Trace ----
   at System.String.Substring(Int32 startIndex, Int32 length)
   at Alphora.Dataphor.DAE.Debug.SourceUtility.CopySection(String script, LineInfo lineInfo) ...

Whereas, if a line break was added before the "end;", then this parsed and created the operator successfully (which would output 42 when invoked).

The fix is to make the parser not whitespace sensitive when it shouldn't be.