Fix typos in comments/error messages

Author: TysonAndre

src/language_server_protocol.rs

@@ -1631,7 +1631,7 @@ impl LanguageClient {
         }
 
         // TODO: proper integration.
-        let msg = format!("comletionItem/resolve result not handled: {:?}", result);
+        let msg = format!("completionItem/resolve result not handled: {:?}", result);
         warn!("{}", msg);
         self.vim()?.echowarn(&msg)?;
 

src/viewport.rs

@@ -2,7 +2,7 @@ use lsp_types::*;
 
 /// Visible lines of editor.
 ///
-/// Inclusive at start, exclusive at end. Both start aned end are 0-based.
+/// Inclusive at start, exclusive at end. Both start and end are 0-based.
 #[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
 pub struct Viewport {
     pub start: u64,