char literal that is not one code point

Built from the repository at commit a8614dc.

A char literal holds exactly one code point. '' holds none, and 'ab' holds two. An e followed by a combining accent between the quotes is two code points too, however it looks on the screen. Text is a string, written in double quotes: "ab".

Why

A char is one Unicode scalar value, not what a reader sees as one character. Single quotes around text are a string in some languages, so the report offers double quotes as an unsafe fix, unless the text holds ", { or }, which a string reads differently.

Broken

fn main() {
    let c = 'ab'
    print(c)
}

What sisu says

error[E0092]: a `char` holds one code point
 --> E0092.sisu:2:13
  |
2 |     let c = 'ab'
  |             ^^^^
  |
help: if you meant a string, write it in double quotes
  |
2 -     let c = 'ab'
2 +     let c = "ab"
  |

sisu: 1 error
sisu: for more on a code, run `sisu explain <code>`: E0092

Fixed

fn main() {
    let c = 'a'
    print(c)
}