update elements and fix some bugs

lib/src/prism/components/prism-scss.min.js

-Prism.languages.scss=Prism.languages.extend("css",{comment:{pattern:/(^|[^\\])(\/\*[\w\W]*?\*\/|\/\/.*?(\r?\n|$))/,lookbehind:!0},atrule:{pattern:/@[\w-]+(?:\([^()]+\)|[^(])*?(?=\s+(\{|;))/i,inside:{rule:/@[\w-]+/}},url:/([-a-z]+-)*url(?=\()/i,selector:{pattern:/([^@;\{\}\(\)]?([^@;\{\}\(\)]|&|#\{\$[-_\w]+\})+)(?=\s*\{(\}|\s|[^\}]+(:|\{)[^\}]+))/m,inside:{placeholder:/%[-_\w]+/i}}}),Prism.languages.insertBefore("scss","atrule",{keyword:/@(if|else if|else|for|each|while|import|extend|debug|warn|mixin|include|function|return|content)|(?=@for\s+\$[-_\w]+\s)+from/i}),Prism.languages.insertBefore("scss","property",{variable:/((\$[-_\w]+)|(#\{\$[-_\w]+\}))/i}),Prism.languages.insertBefore("scss","function",{placeholder:{pattern:/%[-_\w]+/i,alias:"selector"},statement:/\B!(default|optional)\b/i,"boolean":/\b(true|false)\b/,"null":/\b(null)\b/,operator:/\s+([-+]{1,2}|={1,2}|!=|\|?\||\?|\*|\/|%)\s+/}),Prism.languages.scss.atrule.inside.rest=Prism.util.clone(Prism.languages.scss);
+Prism.languages.scss=Prism.languages.extend("css",{comment:{pattern:/(^|[^\\])(?:\/\*[\w\W]*?\*\/|\/\/.*)/,lookbehind:!0},atrule:{pattern:/@[\w-]+(?:\([^()]+\)|[^(])*?(?=\s+[{;])/,inside:{rule:/@[\w-]+/}},url:/(?:[-a-z]+-)*url(?=\()/i,selector:{pattern:/(?=\S)[^@;\{\}\(\)]?([^@;\{\}\(\)]|&|#\{\$[-_\w]+\})+(?=\s*\{(\}|\s|[^\}]+(:|\{)[^\}]+))/m,inside:{placeholder:/%[-_\w]+/}}}),Prism.languages.insertBefore("scss","atrule",{keyword:[/@(?:if|else(?: if)?|for|each|while|import|extend|debug|warn|mixin|include|function|return|content)/i,{pattern:/( +)(?:from|through)(?= )/,lookbehind:!0}]}),Prism.languages.insertBefore("scss","property",{variable:/\$[-_\w]+|#\{\$[-_\w]+\}/}),Prism.languages.insertBefore("scss","function",{placeholder:{pattern:/%[-_\w]+/,alias:"selector"},statement:/\B!(?:default|optional)\b/i,"boolean":/\b(?:true|false)\b/,"null":/\bnull\b/,operator:{pattern:/(\s)(?:[-+*\/%]|[=!]=|<=?|>=?|and|or|not)(?=\s)/,lookbehind:!0}}),Prism.languages.scss.atrule.inside.rest=Prism.util.clone(Prism.languages.scss);