Fix multi byte auto pairs (#4024)

* Fix test::print for Unicode

The print function was not generating correct translations when
the input has Unicode (non-ASCII) in it. This is due to its use of
String::len, which gives the length in bytes, not chars.

* Fix multi-code point auto pairs

The current code for auto pairs is counting offsets by summing the
length of the open and closing chars with char::len_utf8. Unfortunately,
this gives back bytes, and the offset needs to be in chars.

Additionally, it was discovered that there was a preexisting bug where
the selection was not computed correctly in the case that the cursor
was:

1. a single grapheme in width
2. this grapheme was more than one char
3. the direction of the cursor is backwards
4. a secondary range

In this case, the offset was not being added into the anchor. This was
fixed.

* migrate auto pairs tests to integration

* review comments

1 files changed, 1 insertions, 1 deletions

diff --git a/helix-view/src/clipboard.rs b/helix-view/src/clipboard.rs
index f3d94734..ad6f621a 100644
--- a/helix-view/src/clipboard.rs
+++ b/helix-view/src/clipboard.rs
@@ -17,7 +17,7 @@ pub trait ClipboardProvider: std::fmt::Debug {
 #[cfg(not(windows))]
 macro_rules! command_provider {
     (paste => $get_prg:literal $( , $get_arg:literal )* ; copy => $set_prg:literal $( , $set_arg:literal )* ; ) => {{
-        log::info!(
+        log::debug!(
             "Using {} to interact with the system clipboard",
             if $set_prg != $get_prg { format!("{}+{}", $set_prg, $get_prg)} else { $set_prg.to_string() }
         );