Subsection names can contain any characters except newline (doublequote
'`"`' and backslash have to be escaped as '`\"`' and '`\\`',
-respecitvely) and are case sensitive. Section header cannot span multiple
+respectively) and are case sensitive. Section header cannot span multiple
lines. Variables may belong directly to a section or to a given subsection.
You can have `[section]` if you have `[section "subsection"]`, but you
don't need to.