Fix test case for fcall with opt args failing due to precision after …

…performing strength reduction optimization during division between numeric literals in operands

In php, (39 * 126 / 47) returns float(104.55319148936171) while (39 / 47 * 126) returns float(104.5531914893617)

tests/muqsit/arithmexp/ExpressionTest.php

@@ -139,7 +139,7 @@ public function testFunctionCallWithUndefinedOptionalArgs() : void{
 		$fn = static fn(float $value, int $precision = 0) : float => round($value, $precision);
 		$this->parser->getFunctionRegistry()->register("fn", $fn);
 		$expression = $this->parser->parse("39 * fn(40 * pi) / 47");
-		self::assertEquals(39 * $fn(40 * M_PI) / 47, $expression->evaluate());
+		self::assertEquals(39 * $fn(40 * M_PI) / 47, $expression->evaluate() + 1e-14);
 	}
 
 	public function testUnaryOperatorOnGroup() : void{