st: -reshape- and variable names involving zero (0)

[Roberto Ferrer <refp16@gmail.com>]

This derived from

http://www.stata.com/statalist/archive/2013-10/msg00949.html

The following does not give the result I would expect:

*------------------------ begin code ----------------------------------------
clear
input id str4 ticker str20 type return06 return07 return08
1 "ABCB" "formation" 0.01 0.2 0.3
2 "AEDU" "formation" 0.02 0.4 0.5
3 "AMBV" "formation" 0.01 0.2 0.3
1 "ABCB" "buysell" 0.01 0.2 0.3
2 "AEDU" "buysell" 0.01 0.2 0.3
3 "AMBV" "buysell" 0.01 0.2 0.3
1 "ABCB" "holding" 0.01 0.2 0.3
2 "AEDU" "holding" 0.01 0.2 0.3
3 "AMBV" "holding" 0.01 0.2 0.3
end

reshape long return, i(id type) j(period)
list
*--------------------- end code ------------------------------------------------

In the output I can see:

xij variables:
                return6 return7 return8   ->   return

which I believe should be:

return06 return07 return08

Notice the zeros are cropped out.

If I rename return06, return07, return08 to
return16, return17, return18, the code returns what I expect.

What am I missing? What's the problem with the original names
and -reshape- ?
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