formatting, update

lib/classes/Graph.ts

@@ -83,7 +83,7 @@ export class Graph extends Element {
       .replace (/^\s+$/gmu, '');
   }
 
-  public add_node (constructor: ((n: Node) => void) | string): string {
+  public add_node (constructor: string | ((n: Node) => void)): string {
     const node = new Node ('unnamed', this.full_name);
 
     if (typeof constructor === 'string') {
@@ -96,7 +96,7 @@ export class Graph extends Element {
     return node.full_name;
   }
 
-  public add_graph (constructor: ((g: Graph) => void) | string): string {
+  public add_graph (constructor: string | ((g: Graph) => void)): string {
     const graph = new Graph ('unnamed', this.full_name);
 
     graph.directional = this.directional;

lib/classes/GraphStream.ts

@@ -168,7 +168,7 @@ export class GraphStream extends Transform {
     // this.write ({ type: 'en', args: [] });
   }
 
-  public create_graph (name: string, type: 'u'|'d'|'s' = 's'): void {
+  public create_graph (name: string, type: 'd' | 's' | 'u' = 's'): void {
     const instr_type = `c${type}g` as GraphStreamCommand;
     this.write ({ type: instr_type, args: [ validate_name (name) ] });
   }

test/spec/Stream.ts

@@ -43,7 +43,7 @@ const complex = `digraph foo {
 
 // eslint-disable-next-line max-lines-per-function
 describe ('stream', () => {
-  it ('stream graph', () => new Promise ((resolve) => {
+  it ('stream graph', () => new Promise<void> ((resolve) => {
     let output = '';
     const stream = (new GraphStream);
     stream.on ('data', (data) => {
@@ -60,7 +60,7 @@ describe ('stream', () => {
   }));
 
   // eslint-disable-next-line max-statements
-  it ('complex stream graph', () => new Promise ((resolve) => {
+  it ('complex stream graph', () => new Promise<void> ((resolve) => {
     let output = '';
     const stream = (new GraphStream);
     stream.on ('data', (data) => {