diff --git a/src/scheme/scheme.ts b/src/scheme/scheme.ts
index 328d81ea..7c3129f3 100644
--- a/src/scheme/scheme.ts
+++ b/src/scheme/scheme.ts
@@ -9,116 +9,119 @@ import IRichLanguageConfiguration = monaco.languages.LanguageConfiguration;
 import ILanguage = monaco.languages.IMonarchLanguage;
 
 export const conf: IRichLanguageConfiguration = {
-    comments: {
-        lineComment: ';',
-        blockComment: ['#|', '|#'],
-    },
+	comments: {
+		lineComment: ';',
+		blockComment: ['#|', '|#'],
+	},
 
-    brackets: [['(', ')'], ['{', '}'], ['[', ']']],
+	brackets: [['(', ')'], ['{', '}'], ['[', ']']],
 
-    autoClosingPairs: [
-        { open: '{', close: '}' },
-        { open: '[', close: ']' },
-        { open: '(', close: ')' },
-        { open: '"', close: '"' },
-    ],
+	autoClosingPairs: [
+		{ open: '{', close: '}' },
+		{ open: '[', close: ']' },
+		{ open: '(', close: ')' },
+		{ open: '"', close: '"' },
+	],
 
-    surroundingPairs: [
-        { open: '{', close: '}' },
-        { open: '[', close: ']' },
-        { open: '(', close: ')' },
-        { open: '"', close: '"' },
-    ],
+	surroundingPairs: [
+		{ open: '{', close: '}' },
+		{ open: '[', close: ']' },
+		{ open: '(', close: ')' },
+		{ open: '"', close: '"' },
+	],
 };
 
 export const language = <ILanguage>{
-    defaultToken: '',
-    ignoreCase: true,
-    tokenPostfix: '.scheme',
+	defaultToken: '',
+	ignoreCase: true,
+	tokenPostfix: '.scheme',
 
-    brackets: [
-        { open: '(', close: ')', token: 'delimiter.parenthesis' },
-        { open: '{', close: '}', token: 'delimiter.curly' },
-        { open: '[', close: ']', token: 'delimiter.square' },
-    ],
+	brackets: [
+		{ open: '(', close: ')', token: 'delimiter.parenthesis' },
+		{ open: '{', close: '}', token: 'delimiter.curly' },
+		{ open: '[', close: ']', token: 'delimiter.square' },
+	],
 
-    keywords: [
-        'case',
-        'do',
-        'let',
-        'loop',
-        'if',
-        'else',
-        'when',
-        'cons',
-        'car',
-        'cdr',
-        'cond',
-        'lambda',
-        'lambda*',
-        'syntax-rules',
-        'format',
-        'set!',
-        'quote',
-        'eval',
-        'append',
-        'list',
-        'list?',
-        'member?',
-        'load',
-    ],
+	keywords: [
+		'case',
+		'do',
+		'let',
+		'loop',
+		'if',
+		'else',
+		'when',
+		'cons',
+		'car',
+		'cdr',
+		'cond',
+		'lambda',
+		'lambda*',
+		'syntax-rules',
+		'format',
+		'set!',
+		'quote',
+		'eval',
+		'append',
+		'list',
+		'list?',
+		'member?',
+		'load',
+	],
 
-    constants: ['#t', '#f'],
+	constants: ['#t', '#f'],
 
-    operators: ['eq?', 'eqv?', 'equal?', 'and', 'or', 'not', 'null?'],
+	operators: ['eq?', 'eqv?', 'equal?', 'and', 'or', 'not', 'null?'],
 
-    tokenizer: {
-        root: [
-            [/#[xXoObB][0-9a-fA-F]+/, 'number.hex'],
-            [/[+-]?\d+(?:(?:\.\d*)?(?:[eE][+-]?\d+)?)?/, 'number.float'],
+	tokenizer: {
+		root: [
+			[/#[xXoObB][0-9a-fA-F]+/, 'number.hex'],
+			[/[+-]?\d+(?:(?:\.\d*)?(?:[eE][+-]?\d+)?)?/, 'number.float'],
 
-            [/(?:\b(?:(define|define-syntax|define-macro))\b)(\s+)((?:\w|\-|\!|\?)*)/, ['keyword', 'white', 'variable']],
+			[
+				/(?:\b(?:(define|define-syntax|define-macro))\b)(\s+)((?:\w|\-|\!|\?)*)/,
+				['keyword', 'white', 'variable'],
+			],
 
-            [
-                /[a-zA-Z_#][a-zA-Z0-9_\-\?\!\*]*/,
-                {
-                    cases: {
-                        '@keywords': 'keyword',
-                        '@constants': 'constant',
-                        '@operators': 'operators',
-                        '@default': 'identifier',
-                    },
-                },
-            ],
+			{ include: '@whitespace' },
+			{ include: '@strings' },
 
-            { include: '@whitespace' },
-            { include: '@strings' },
-        ],
+			[
+				/[a-zA-Z_#][a-zA-Z0-9_\-\?\!\*]*/,
+				{
+					cases: {
+						'@keywords': 'keyword',
+						'@constants': 'constant',
+						'@operators': 'operators',
+						'@default': 'identifier',
+					},
+				},
+			],
+		],
 
-        comment: [
-            [/[^\|#]+/, 'comment'],
-            [/\|\#/, 'comment', '@push'],
-            [/#\|/, 'comment', '@pop'],
-            [/[\|#]/, 'comment'],
-        ],
+		comment: [
+			[/[^\|#]+/, 'comment'],
+			[/#\|/, 'comment', '@push'],
+			[/\|#/, 'comment', '@pop'],
+			[/[\|#]/, 'comment'],
+		],
 
-        whitespace: [
-            [/[ \t\r\n]+/, 'white'],
-            [/\|\#/, 'comment', '@comment'],
-            [/;.*$/, 'comment'],
-        ],
+		whitespace: [
+			[/[ \t\r\n]+/, 'white'],
+			[/#\|/, 'comment', '@comment'],
+			[/;.*$/, 'comment'],
+		],
 
-        strings: [
-            [/"$/, 'string', '@popall'],
-            [/"(?=.)/, 'string', '@multiLineString'],
-        ],
+		strings: [
+			[/"$/, 'string', '@popall'],
+			[/"(?=.)/, 'string', '@multiLineString'],
+		],
 
-        multiLineString: [
-            [/\\./, 'string.escape'],
-            [/"/, 'string', '@popall'],
-            [/.(?=.*")/, 'string'],
-            [/.*\\$/, 'string'],
-            [/.*$/, 'string', '@popall'],
-        ],
-    },
+		multiLineString: [
+			[/\\./, 'string.escape'],
+			[/"/, 'string', '@popall'],
+			[/.(?=.*")/, 'string'],
+			[/.*\\$/, 'string'],
+			[/.*$/, 'string', '@popall'],
+		],
+	},
 };