test all in source examples

packages/core/drawLine.mjs

@@ -21,6 +21,7 @@ import Fraction, { gcd } from './fraction.mjs';
  * @example
  * const line = drawLine("0 [1 2 3]", 10); // |0--123|0--123
  * console.log(line);
+ * silence;
  */
 function drawLine(pat, chars = 60) {
   let cycle = 0;

packages/core/index.mjs

@@ -15,6 +15,7 @@ export * from './state.mjs';
 export * from './timespan.mjs';
 export * from './util.mjs';
 export * from './speak.mjs';
+export { default as drawLine } from './drawLine.mjs';
 export { default as gist } from './gist.js';
 // below won't work with runtime.mjs (json import fails)
 /* import * as p from './package.json';

packages/core/pattern.mjs

@@ -32,8 +32,10 @@ export class Pattern {
    * @param {Fraction | number} end to time
    * @returns Hap[]
    * @example
-   * const pattern = sequence('a', ['b', 'c']);
-   * const haps = pattern.queryArc(0, 1);
+   * const pattern = sequence('a', ['b', 'c'])
+   * const haps = pattern.queryArc(0, 1)
+   * console.log(haps)
+   * silence
    */
   queryArc(begin, end) {
     return this.query(new State(new TimeSpan(begin, end)));
@@ -1543,6 +1545,9 @@ export function pure(value) {
 
 export function isPattern(thing) {
   // thing?.constructor?.name !== 'Pattern' // <- this will fail when code is mangled
+  if (!thing) {
+    console.log('no thing', thing);
+  }
   const is = thing instanceof Pattern || thing._Pattern;
   if (!thing instanceof Pattern) {
     console.warn(