Avoid wrapping error message across source lines
This makes the source of the message easier to locate for someone using
grep with the full message.
The Linux kernel coding style follows the same approach:
https://www.kernel.org/doc/html/v5.10/process/coding-style.html#breaking-long-lines-and-strings
> never break user-visible strings such as printk messages because that
> breaks the ability to grep for them.
diff --git a/syntax/check.rs b/syntax/check.rs
index 6228734..2aefbdf 100644
--- a/syntax/check.rs
+++ b/syntax/check.rs
@@ -383,9 +383,7 @@
false => "",
};
let msg = format!(
- "unnamed receiver type is only allowed if the surrounding \
- extern block contains exactly one extern type; \
- use `self: &{mutability}TheType`",
+ "unnamed receiver type is only allowed if the surrounding extern block contains exactly one extern type; use `self: &{mutability}TheType`",
mutability = mutability,
);
cx.error(span, msg);