update elements and fix some bugs

lib/src/prism/components/prism-prolog.js

+Prism.languages.prolog = {
+        // Syntax depends on the implementation
+        'comment': [
+                /%.+/,
+                /\/\*[\s\S]*?\*\//
+        ],
+        // Depending on the implementation, strings may allow escaped newlines and quote-escape
+        'string': /(["'])(?:\1\1|\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
+        'builtin': /\b(?:fx|fy|xf[xy]?|yfx?)\b/,
+        'variable': /\b[A-Z_]\w*/,
+        // FIXME: Should we list all null-ary predicates (not followed by a parenthesis) like halt, trace, etc.?
+        'function': /\b[a-z]\w*(?:(?=\()|\/\d+)/,
+        'number': /\b\d+\.?\d*/,
+        // Custom operators are allowed
+        'operator': /[:\\=><\-?*@\/;+^|!$.]+|\b(?:is|mod|not|xor)\b/,
+        'punctuation': /[(){}\[\],]/
+};