Fix error messages when no language server is available

Co-authored-by: Skyler Hawthorne <skyler@dead10ck.com>

helix-term/src/commands/lsp.rs

@@ -1130,7 +1130,7 @@ pub fn goto_implementation(cx: &mut Context) {
         Some(future_offset_encoding) => future_offset_encoding,
         None => {
             cx.editor
-                .set_error("no language server supports goto-implementation");
+                .set_error("No language server supports goto-implementation");
             return;
         }
     };
@@ -1164,7 +1164,7 @@ pub fn goto_reference(cx: &mut Context) {
         Some(future_offset_encoding) => future_offset_encoding,
         None => {
             cx.editor
-                .set_error("language server supports goto-reference");
+                .set_error("No language server supports goto-reference");
             return;
         }
     };

helix-view/src/editor.rs

@@ -48,7 +48,7 @@ use helix_core::{
 };
 use helix_core::{Position, Selection};
 use helix_dap as dap;
-use helix_lsp::{lsp, OffsetEncoding};
+use helix_lsp::lsp;
 
 use serde::{ser::SerializeMap, Deserialize, Deserializer, Serialize, Serializer};