df: fix incorrect whitespace between columns #3386
Merged
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The main idea behind this PR is to introduce a
Table
struct to print a table. The print process now consists of two steps: 1) calculate the widths of the columns and 2) print the data.Header
andDisplayRow
(which has been renamed toRowFormatter
(I'm not sure about this name, I struggled to find a name for it)) no longer do any output, they simply prepare the strings used by the table.Fixes #3194.