Fix typos

crates/gen_lsp_server/src/lib.rs

@@ -1,4 +1,4 @@
-//! A language server scaffold, exposing synchroneous crossbeam-channel based API.
+//! A language server scaffold, exposing a synchronous crossbeam-channel based API.
 //! This crate handles protocol handshaking and parsing messages, while you
 //! control the message dispatch loop yourself.
 //!

crates/ra_analysis/src/lib.rs

@@ -1,5 +1,5 @@
 //! ra_analyzer crate is the brain of Rust analyzer. It relies on the `salsa`
-//! crate, which provides and incremental on-deman database of facts.
+//! crate, which provides and incremental on-demand database of facts.
 
 extern crate fst;
 extern crate ra_editor;