missing_argument_linter() throws for 0-arg call with a comment

```r
lint("mutate( # comment\n)", missing_argument_linter())
# <text>:2:1: style: [missing_argument_linter] Missing argument 1 in function call.
# )
# ^

# vs. with no comment
lint("mutate(\n)", missing_argument_linter())
# ℹ No lints found.
```