Syntax: A single line
A raw line.
Syntax: A single line with leading spaces
Another raw line, with leading spaces.
Syntax: Area (block)
A raw area delimited
by lines with marks.
Syntax: Area (block) with trailing spaces
Trailing spaces and TABs after the area marks
are allowed, but not encouraged nor documented.
Invalid: No space between mark and contents
"""Not a raw line, need one space after mark.
Invalid: Leading spaces on block marks
"""
Not a raw area.
The marks must be at the line beginning,
no leading spaces.
"""
Closing: EOF closes the open block
The end of the file (EOF) closes
the currently open raw area.