cue: fix misspells

Change-Id: I067e923857d30d01e674715f0988d396c071a37f
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/6661
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/internal/cuetxtar/txtar.go b/internal/cuetxtar/txtar.go
index 241305f..b24f43a 100644
--- a/internal/cuetxtar/txtar.go
+++ b/internal/cuetxtar/txtar.go
@@ -105,7 +105,7 @@
 	return "", false
 }
 
-// Bool searchs for a line starting with #key: value in the comment and
+// Bool searches for a line starting with #key: value in the comment and
 // returns true if the key exists and the value is true.
 func (t *Test) Bool(key string) bool {
 	s, ok := t.Value(key)