Merge #11

11: Switch to mathematical range notation r=matklad a=matklad

Just an option: `[10..20)` feel like a weird mix of rust and math. `[10, 20)` is just picking the math notation. 

Co-authored-by: Aleksey Kladov <[email protected]>

Author: bors[bot]

src/range.rs

@@ -35,7 +35,7 @@ pub struct TextRange {
 
 impl fmt::Debug for TextRange {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "[{}..{})", self.start().raw, self.end().raw)
+        write!(f, "{}..{}", self.start().raw, self.end().raw)
     }
 }