Improved errors

cli/src/error.rs

@@ -83,7 +83,7 @@ impl<'a> From<tree_sitter_highlight::Error> for Error {
 
 impl<'a> From<tree_sitter_tags::Error> for Error {
     fn from(error: tree_sitter_tags::Error) -> Self {
-        Error::new(format!("{:?}", error))
+        Error::new(format!("{}", error))
     }
 }
 

tags/src/lib.rs

@@ -62,6 +62,15 @@ pub enum Error {
     InvalidCapture(String),
 }
 
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Error::InvalidCapture(name) => write!(f, "Invalid capture @{}. Expected one of: @definition.*, @reference.*, @doc, @name, @local.(scope|definition|reference).", name),
+            _ => write!(f, "{:?}", self)
+        }
+    }
+}
+
 #[derive(Debug, Default)]
 struct PatternInfo {
     docs_adjacent_capture: Option<u32>,