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tomlkit inserts an invalid comma when appending to unusually formatted array #494
Description
Bit of an edge case: but I found it so I might as well tell you about it.
import tomlkit
src = """
a = [
1 # comma is on the next line
,2
]
"""
doc = tomlkit.parse(src)
assert doc == {"a": [1, 2]}, "src is valid TOML"
doc["a"].append(99)
out = tomlkit.dumps(doc)
print(out)output:
a = [
1 # comma is on the next line
,2,
,99
]
which has too many commas between the 2 and the 99.
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