Auto merge of #73746 - Manishearth:rollup-80jnynm, r=Manishearth

Rollup of 14 pull requests

Successful merges:

 - #72617 (Add a fast path for `std::thread::panicking`.)
 - #72738 (Self contained linking option)
 - #72770 (Implement mixed script confusable lint.)
 - #73418 (Add unstable `core::mem::variant_count` intrinsic)
 - #73460 (Emit line info for generator variants)
 - #73534 (Provide suggestions for some moved value errors)
 - #73538 (make commented examples use valid syntax, and be more consistent )
 - #73581 (Create 0766 error code)
 - #73619 (Document the mod keyword)
 - #73621 (Document the mut keyword)
 - #73648 (Document the return keyword)
 - #73673 (Fix ptr doc warnings.)
 - #73674 (Tweak binop errors)
 - #73687 (Clean up E0701 explanation)

Failed merges:

 - #73708 (Explain move errors that occur due to method calls involving `self` (take two))

r? @ghost

2 files changed, 14 insertions, 1 deletions

diff --git a/src/librustc_error_codes/error_codes/E0701.md b/src/librustc_error_codes/error_codes/E0701.md
index 87f416ada18..4965e643105 100644
--- a/src/librustc_error_codes/error_codes/E0701.md
+++ b/src/librustc_error_codes/error_codes/E0701.md
@@ -1,7 +1,7 @@
 This error indicates that a `#[non_exhaustive]` attribute was incorrectly placed
 on something other than a struct or enum.
 
-Examples of erroneous code:
+Erroneous code example:
 
 ```compile_fail,E0701
 #[non_exhaustive]
diff --git a/src/librustc_error_codes/error_codes/E0766.md b/src/librustc_error_codes/error_codes/E0766.md
new file mode 100644
index 00000000000..4e775df2cac
--- /dev/null
+++ b/src/librustc_error_codes/error_codes/E0766.md
@@ -0,0 +1,13 @@
+A double quote byte string (`b"`) was not terminated.
+
+Erroneous code example:
+
+```compile_fail,E0766
+let s = b"; // error!
+```
+
+To fix this error, add the missing double quote at the end of the string:
+
+```
+let s = b""; // ok!
+```