keybase/client: go/chat/unfurl/scrape_generic.go; 27 LoC

Found a possible issue in [keybase/client](https://www.github.com/keybase/client) at [go/chat/unfurl/scrape_generic.go](https://github.com/keybase/client/blob/a144e0ce38ee9e495cc5acbcd4ef859f5534d820/go/chat/unfurl/scrape_generic.go#L58-L84)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first
issue it finds, so please do not limit your consideration to the contents of the below message.

> function call at line 80 may store a reference to content

[Click here to see the code in its original context.](https://github.com/keybase/client/blob/a144e0ce38ee9e495cc5acbcd4ef859f5534d820/go/chat/unfurl/scrape_generic.go#L58-L84)

Click here to show the 27 line(s) of Go which triggered the analyzer.

```go
for _, content := range contents {
content = strings.Trim(content, " ")
if content == "" {
continue
}
switch ranker.setter {
case setTitle:
generic.setTitle(content, score)
case setURL:
url := fullURL(hostname, content)
generic.setURL(url, score)
case setSiteName:
generic.setSiteName(content, score)
case setFaviconURL:
url := fullURL(hostname, content)
generic.setFaviconURL(&url, score)
case setImageURL:
url := fullURL(hostname, content)
generic.setImageURL(&url, score)
case setPublishTime:
s.setAndParsePubTime(ctx, content, generic, score)
case setDescription:
generic.setDescription(&content, score)
case setVideo:
generic.setVideo(content, score)
}
}

```

Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: a144e0ce38ee9e495cc5acbcd4ef859f5534d820