update elements and fix some bugs

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

 Prism.languages.twig = {
         'comment': /\{#[\s\S]*?#\}/,
         'tag': {
-                pattern: /(\{\{[\s\S]*?\}\}|\{%[\s\S]*?%\})/,
+                pattern: /\{\{[\s\S]*?\}\}|\{%[\s\S]*?%\}/,
                 inside: {
                         'ld': {
-                                pattern: /^(\{\{\-?|\{%\-?\s*\w+)/,
+                                pattern: /^(?:\{\{\-?|\{%\-?\s*\w+)/,
                                 inside: {
-                                        'punctuation': /^(\{\{|\{%)\-?/,
+                                        'punctuation': /^(?:\{\{|\{%)\-?/,
                                         'keyword': /\w+/
                                 }
                         },
                         'rd': {
-                                pattern: /\-?(%\}|\}\})$/,
+                                pattern: /\-?(?:%\}|\}\})$/,
                                 inside: {
                                         'punctuation': /.*/
                                 }
                         },
                         'string': {
-                                pattern: /("|')(\\?.)*?\1/,
+                                pattern: /("|')(?:\\?.)*?\1/,
                                 inside: {
-                                        'punctuation': /^('|")|('|")$/
+                                        'punctuation': /^['"]|['"]$/
                                 }
                         },
-                        'keyword': /\b(if)\b/,
-                        'boolean': /\b(true|false|null)\b/,
-                        'number': /\b-?(0x[\dA-Fa-f]+|\d*\.?\d+([Ee]-?\d+)?)\b/,
-                        'operator': /==|=|!=|<|>|>=|<=|\+|\-|~|\*|\/|\/\/|%|\*\*|\|/,
-                        'space-operator': {
-                                pattern: /(\s)(\b(not|b\-and|b\-xor|b\-or|and|or|in|matches|starts with|ends with|is)\b|\?|:|\?:)(?=\s)/,
-                                lookbehind: true,
-                                inside: {
-                                        'operator': /.*/
-                                }
-                        },
+                        'keyword': /\b(?:even|if|odd)\b/,
+                        'boolean': /\b(?:true|false|null)\b/,
+                        'number': /\b-?(?:0x[\dA-Fa-f]+|\d*\.?\d+([Ee][-+]?\d+)?)\b/,
+                        'operator': [
+                                {
+                                        pattern: /(\s)(?:and|b\-and|b\-xor|b\-or|ends with|in|is|matches|not|or|same as|starts with)(?=\s)/,
+                                        lookbehind: true
+                                },
+                                /[=<>]=?|!=|\*\*?|\/\/?|\?:?|[-+~%|]/
+                        ],
                         'property': /\b[a-zA-Z_][a-zA-Z0-9_]*\b/,
-                        'punctuation': /\(|\)|\[\]|\[|\]|\{|\}|:|\.|,/
+                        'punctuation': /[()\[\]{}:.,]/
                 }
         },
 
         // The rest can be parsed as HTML
         'other': {
-                pattern: /[\s\S]*/,
+                // We want non-blank matches
+                pattern: /\S(?:[\s\S]*\S)?/,
                 inside: Prism.languages.markup
         }
 };