graph: fix extra spaces in graph_padding_line
The graph_padding_line() function outputs a series of "|" columns, and then pads with spaces to graph->width by calling graph_pad_horizontally(). However, we tell the latter that we wrote graph->num_columns characters, which is not true; we also needed spaces between the columns. Let's keep a count of how many characters we've written, which is what all the other callers of graph_pad_horizontally() do. Without this, any output that is written at the end of a padding line will be bumped out by at least an extra graph->num_columns spaces. Presumably nobody ever noticed the bug because there's no code path that actually writes to the end of a padding line. Signed-off-by: NJeff King <peff@peff.net> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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