Problems with the DO command

[Dar Scott]

Ian McKnight wrote (quoting Jan):

>>   processmytable "put mytable[tx,ty] into fld" && \
>>     quote & "mydisplay" & quote
>>
>> Hope it works,
>
>
> It did! Thanks very much.

Earlier, Klaus wrote:
> processmytable "put mytable[tx,ty] after last char of fld" & 
> quote & "mydisplay" & quote

I'm trying to understand what is happening here.  If we ignore the 
into/after variations, it looks to me that the only difference is 
the space between fld and the quote.  Is "do" parsing really that 
fragile?

Dar Scott