Better handle on type formatting when there's content inside a block

[vinistock]

Based on #462 (comment), we should better handle what happens with on type formatting in case there is content in the next line.

For example

if something
# ^ break here
immediate_content

# This results in this, which is definitely not ideal
if something
endimmediate_content

Fixing this means we have to perform some sort of lookahead to figure out what comes on the next lines.