Auto merge of #34660 - jseyfried:fix_parse_stmt, r=nrc

Fix bugs in macro-expanded statement parsing

Fixes #34543.

This is a [breaking-change]. For example, the following would break:
```rust
macro_rules! m { () => {
    println!("") println!("")
    //^ Semicolons are now required on macro-expanded non-braced macro invocations
    //| in statement positions.
    let x = 0
    //^ Semicolons are now required on macro-expanded `let` statements
    //| that are followed by more statements, so this would break.
    let y = 0 //< (this would still be allowed to reduce breakage in the wild)
}
fn main() { m!() }
```

r? @eddyb

1 files changed, 2 insertions, 2 deletions

diff --git a/src/doc/book/macros.md b/src/doc/book/macros.md
index f535fb96af8..9f40829f423 100644
--- a/src/doc/book/macros.md
+++ b/src/doc/book/macros.md
@@ -328,7 +328,7 @@ invocation site. Code such as the following will not work:
 
 ```rust,ignore
 macro_rules! foo {
-    () => (let x = 3);
+    () => (let x = 3;);
 }
 
 fn main() {
@@ -342,7 +342,7 @@ tagged with the right syntax context.
 
 ```rust
 macro_rules! foo {
-    ($v:ident) => (let $v = 3);
+    ($v:ident) => (let $v = 3;);
 }
 
 fn main() {