U:RDoc::AnyMethod[iI"proper_subset?:ETI"Set#proper_subset?;TF:publico:RDoc::Markup::Document:@parts[o:RDoc::Markup::Paragraph;	[I"AReturns true if the set is a proper subset of the given set.;T:
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set.c;T:0@omit_headings_from_table_of_contents_below0I")proper_subset?(set) -> true or false;T0[[I"<;T@	I"	(p1);T@FI"Set;TcRDoc::NormalClass00