update elements and fix some bugs

lib/src/prism/tests/languages/j/number_feature.test

+2.3e2 2.3e_2 2j3
+230 0.023 2j3
+
+2p1 1p_1
+6.28319 0.31831
+
+1x2 2x1 1x_1
+7.38906 5.43656 0.367879
+
+2e2j_2e2 2e2j2p1 2ad45 2ar0.785398
+200j_200 628.319j6.28319 1.41421j1.41421 1.41421j1.41421
+
+16b1f 10b23 _10b23 1e2b23 2b111.111
+31 23 _17 203 7.875
+
+_ __
+
+----------------------------------------------------
+
+[
+        ["number", "2.3e2"], ["number", "2.3e_2"], ["number", "2j3"],
+        ["number", "230"], ["number", "0.023"], ["number", "2j3"],
+
+        ["number", "2p1"], ["number", "1p_1"],
+        ["number", "6.28319"], ["number", "0.31831"],
+
+        ["number", "1x2"], ["number", "2x1"], ["number", "1x_1"],
+        ["number", "7.38906"], ["number", "5.43656"], ["number", "0.367879"],
+
+        ["number", "2e2j_2e2"], ["number", "2e2j2p1"], ["number", "2ad45"], ["number", "2ar0.785398"],
+        ["number", "200j_200"], ["number", "628.319j6.28319"], ["number", "1.41421j1.41421"], ["number", "1.41421j1.41421"],
+
+        ["number", "16b1f"], ["number", "10b23"], ["number", "_10b23"], ["number", "1e2b23"], ["number", "2b111.111"],
+        ["number", "31"], ["number", "23"], ["number", "_17"], ["number", "203"], ["number", "7.875"],
+
+        ["number", "_"], ["number", "__"]
+]
+
+----------------------------------------------------
+
+Checks for numbers.