Improve strings.Builder and write article

### What happened?

.

### What did you expect to happen?

.

### How can we reproduce it (as minimally and precisely as possible)?

/

### Helm version

<details>

```console
$ helm version
# paste output here
```
</details>


### Kubernetes version

<details>

```console
$ kubectl version
# paste output here
```

</details>
