librustc: Forbid `..` in range patterns.

This breaks code that looks like:

    match foo {
        1..3 => { ... }
    }

Instead, write:

    match foo {
        1...3 => { ... }
    }

Closes #17295.

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libdebug/repr.rs b/src/libdebug/repr.rs
index 64dc8790882..5fbba286fea 100644
--- a/src/libdebug/repr.rs
+++ b/src/libdebug/repr.rs
@@ -227,7 +227,7 @@ impl<'a> ReprVisitor<'a> {
                     self.writer.write("\"".as_bytes())
                 }
             }
-            '\x20'..'\x7e' => self.writer.write([ch as u8]),
+            '\x20'...'\x7e' => self.writer.write([ch as u8]),
             _ => {
                 char::escape_unicode(ch, |c| {
                     let _ = self.writer.write([c as u8]);