fix: make find_prev_char and till_prev_char work

Bevore this PR `commands::find_prev_char` and `commands::till_prev_char` were triggerable through keys 
but `seach::find_nth_next()` was hardcoded in `_find_char`. 
The passed `fn` was nerver used. With this PR the passed `fn` is used.
The change in search.rs resolves an off by one error in the behivor of `find_nth_prev`

1 files changed, 3 insertions, 2 deletions

diff --git a/helix-core/src/search.rs b/helix-core/src/search.rs
index 55f7bf1d..7dd2f4fc 100644
--- a/helix-core/src/search.rs
+++ b/helix-core/src/search.rs
@@ -41,7 +41,8 @@ pub fn find_nth_prev(
     inclusive: bool,
 ) -> Option<usize> {
     // start searching right before pos
-    let mut chars = text.chars_at(pos.saturating_sub(1));
+    pos = pos.saturating_sub(1);
+    let mut chars = text.chars_at(pos);
 
     for _ in 0..n {
         loop {
@@ -56,7 +57,7 @@ pub fn find_nth_prev(
     }
 
     if !inclusive {
-        pos -= 1;
+        pos += 1;
     }
 
     Some(pos)