Function isGroupHeader
Test whether the string represents a group header.
bool isGroupHeader
(
scope const(char)[] s
) pure nothrow @nogc @safe;
Note
"[]" is not considered to be a valid group header.
Example
assert( isGroupHeader("[Group]"));
assert( isGroupHeader("[Group] "));
assert(!isGroupHeader("[]"));
assert(!isGroupHeader("[Group"));
assert(!isGroupHeader("Group]"));