 				
 				# .OP: Option description (GNU extension)
 				name: "meta.function.option-description.man.macro.gnu.roff"
-				begin: "^([.'])[ \t]*(OP)\\b"
+				begin: "^([.'])[ \t]*(OP)(?=\\s)"
 				end:   "(?<!\\\\)(?=\\n)|(?=\\\\\")"
 				beginCaptures:
 					1: {name: "punctuation.definition.macro.gnu.roff"}

		},{
			
			# .RB: Roman + Bold
			begin: "^([.'])[ \t]*(RB)\\b"
			end:   '(?<![^\\\\]\\\\|^\\\\)(?=\\n|$)|(?=\\\\")'
			beginCaptures:
				0: {name: "meta.function.man.macro.roff"}

		patterns: [{
			
			# .TS/.TE: Tbl
			begin: "^([.'])[ \t]*(TS)(?=\\s|\\\\[\"#])(.*)"
			end:   "^([.'])[ \t]*(TE)(?=\\s|\\\\[\"#])"
			contentName: "markup.other.table.preprocessor.tbl.roff"
			patterns: [include: "#tbl"]
			beginCaptures:
