Parses a column header equivalent to the regexp:
\s*:\s*[delimiterChar]+\s*:\s*
public static bool ParseColumnHeaderDetect(ref StringSlice slice, ref char delimiterChar, scoped out TableColumnAlign? align, scoped out int delimiterCount)
The text slice.
The delimiter character (either - or =). If \0, it will detect the character (either - or =)
The alignment of the column.
The number of times delimiterChar appeared in the column header.
true if parsing was successful