The py_compile.compile() function, when doraise=False
and a compilation error is encountered, simply prints
the message to sys.stderr and returns.  However, it
neglects to add a newline.  Furthermore, judging by the
definition of PyCompileError earlier in the file and
the fact that the message will always come from an
instance of PyCompileError, the message will never
include a newline.

Some shells issue a carraige return before the command
prompt, so that would hide the output from
py_compile.compile if it were the last message to the
console.

Checking all occurences of "py_compile" in the python
source indicates they all either use compile() with
doraise=True or expect normal newline-terminated output
on error.

This patch appends the newline.