utils: make tidy() also clean up the first section - #48
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tidy() started iterating over the top-level lines at index 1, so when
a file starts directly with a section header (the common case), that
first section was never passed to tidy_section() and its consecutive
empty lines were kept:
>>> cfg = INIConfig(StringIO('[a]\nx = 1\n\n\n\ny = 2\n'))
>>> tidy(cfg); str(cfg)
'[a]\nx = 1\n\n\n\ny = 2\n'
Start at index 0 and only compare with the previous line when there
is one.
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tidy() started iterating over the top-level lines at index 1, so when a file starts directly with a section header (the common case), that first section was never passed to tidy_section() and its consecutive empty lines were kept:
Start at index 0 and only compare with the previous line when there is one.