A workspace at a drive root is named "D:\", which made the suggested file name
invalid. Characters that are invalid in a file name on any supported platform are
now removed, and a name left empty (a workspace at /) falls back to YKanBan.
A backslash right before a pipe, as in the tag name a\|b, turned the escaped
pipe into "\|": the table splitter reads "\\" as an escaped backslash and the
pipe as a column separator, shifting the row. Cells now escape '\' before '|'.
Recorded in PLAN 5.8.
AppendLine wrote CRLF on Windows; the document now uses LF everywhere and
converts CRLF/CR inside card bodies and column descriptions. Column titles and
the workspace name are collapsed to one line like card titles.
doyaGu
yyc12345