--[%% INCLUDE block1 %%]--
--[%% INCLUDE block2 %%]--
--[%% INCLUDE block3 %%]--
__MTEND__
%% BLOCK block1 trim=0 %%
This block is not "trimmed"
The leading and trailing newlines are left intact
%% ENDBLOCK %%

%% BLOCK block2 %%
This block is "trimmed"
The leading and trailing newlines are removed.
This gives the results that most people expect.
This is the default mode for MetaText and can be over-ridded with a 
"trim=0" parameter in the BLOCK
%% ENDBLOCK %%

%% BLOCK block3 trim=0 %%This block is not "trimmed" but doesn't introduce any
extraneous newlines%% ENDBLOCK %%