Fixed output through c_sym backend for test_gruntz.py #6200

Job	Run time
Check Debug build	2m 26s
Check Debug build	2m 26s
Build LPython to WASM	4m 45s
Build LPython to WASM	4m 45s
Test CPython Interop (@pythoncall)	1m 43s
Test CPython Interop (@pythoncall)	1m 43s
LPython CI (3.10, ubuntu-latest)	8m 17s
LPython CI (3.10, ubuntu-latest)	8m 17s
Run Integration tests with Python 3.9	1m 34s
Run Integration tests with Python 3.9	1m 34s
LPython CI (3.10, macos-latest)	6h 0m 16s
LPython CI (3.10, macos-latest)	6h 0m 16s
Run SymPy tests	2m 12s
Run SymPy tests	2m 12s
Check Release build	2m 37s
Check Release build	2m 37s
Run Integration tests with Python 3.10	1m 34s
Run Integration tests with Python 3.10	1m 34s
LPython CI (3.10, windows-2019)	16m 12s
LPython CI (3.10, windows-2019)	16m 12s
Run Integration tests with Python 3.11	1m 32s
Run Integration tests with Python 3.11	1m 32s
Test PIP Installable Packages	1m 22s
Test PIP Installable Packages	1m 22s
Run Integration tests with Python 3.12	1m 21s
Run Integration tests with Python 3.12	1m 21s
	13h 31m 42s

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