charged-ieee: Space width is incorrect in raw elements

[MDLC01]

#import "@preview/charged-ieee:0.1.3": ieee

#show: ieee

```
Test
  test
```

Notice how the second line of the raw block appears to be indented by a single character, even though it should be indented by two characters. In other words, the width of spaces in raw elements is about 50% of the width of other characters.