Update parser with rescue block

Author: WhatWasThatt

lib/prawn/text/formatted/parser.rb

@@ -240,7 +240,8 @@ def self.array_from_tokens(tokens)
 
               matches = /size=".*?(\d+(?:\.\d+)?).*?"/.match(token) ||
                 /size='.*?(\d+(?:\.\d+)?).*?'/.match(token)
-              sizes << Float(matches[1]) unless matches.nil?
+              size = (Float(matches[1]) rescue nil) unless matches.nil?
+               sizes << size unless size.nil?
 
               matches = /character_spacing="([^"]*)"/.match(token) ||
                 /character_spacing='([^']*)'/.match(token)