--generate_expected_output adds quotation marks around -DFOO instances in compiler_args

[ben-briant]

When a test defines macros as part of compiler_args (e.g to replace a main function) and --generate_expected_output is used, it surrounds the -DFOO with single quotes. This is treated as a syntax error in autotest.

❯ cat autotest/tests.txt
files=test.c
command=./test

compiler_args=-DFOO=1 test.c -o test

1
❯ autotest -g -a autotest
files=test.c
command=./test

compiler_args='-DFOO=1' test.c -o test

1
### generated by: autotest --generate_expected_output - see https://github.com/COMP1511UNSW/autotest
1 expected_stdout='Hello, world!\n'
❯ autotest -g update -a autotest
❯ autotest -a autotest
autotest: /tmp/tmp.ihUpssD2nV/autotest/tests.txt:4: syntax error in assignment

Test specification documentation & source at: https://github.com/COMP1511UNSW/autotest - issues welcome