Fix title of User Manual page
Asciidoc uses the first line of a doc as the title, so you can't put
comments before the heading.
-// IMPORTANT: the master copy of this document lives in the https://github.com/rust-analyzer/rust-analyzer repository
-
= User Manual
:toc: preamble
:sectanchors:
:source-highlighter: rouge
:experimental:
+////
+IMPORTANT: the master copy of this document lives in the https://github.com/rust-analyzer/rust-analyzer repository
+////
+
At its core, rust-analyzer is a *library* for semantic analysis of Rust code as it changes over time.
This manual focuses on a specific usage of the library -- running it as part of a server that implements the
https://microsoft.github.io/language-server-protocol/[Language Server Protocol] (LSP).
