#391 Single line file with z2 option returns "Formatted" but doesn't change file

[Grant Ramsay]

Tested on Linux with astyle V2.03 and V2.04.

echo "// test" > test.c
astyle -z2 test.c
# Formatted test.c
astyle -z2 test.c
# Formatted test.c

[Jim Pattee]

Needs longer input. About 10 bytes.