Fix some doc comment specifiers

ubi/src/lib.rs

@@ -31,10 +31,10 @@
 //! a file that matches the value given for the `exe` field, if any. Otherwise it looks for a file
 //! with the same name as the project. In either case, the file will be installed with the name it
 //! has in the archive file.
-//
+//!
 //! If the release is in the form of a bare executable or a compressed executable, then the installed
 //! executable will use the name of the project instead.
-//
+//!
 //! This is a bit inconsistent, but it's how `ubi` has behaved since it was created, and I find this
 //! to be the sanest behavior. Some projects, for example `rust-analyzer`, provide releases as
 //! compressed executables with names like `rust-analyzer-x86_64-apple-darwin.gz` and