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"match": "(?x) # turn on extended mode\n -? # an optional minus\n (?:\n 0 # a zero\n | # ...or...\n [1-9] # a 1-9 character\n \\d* # followed by zero or more digits\n )\n (?:\n (?:\n \\. # a period\n \\d+ # followed by one or more digits\n )?\n (?:\n [eE] # an e character\n [+-]? # followed by an option +/-\n \\d+ # followed by one or more digits\n )? # make exponent optional\n )? # make decimal portion optional",
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