address comments

Author: 0xPoe

doc/src/basics.md

@@ -30,16 +30,17 @@ info: downloading self-updates
 
 ## Keeping `rustup` up to date
 
-## Keeping rustup up to date
+If your `rustup` build with the `no-self-update` feature, it will not be able to update itself.
 
-It is possible to control Rustup's automatic self update mechanism with the `auto-self-update` configuration
-variable.  This setting supports three values: `enable` and `disable` and `check-only`.
+If your `rustup` build without the `no-self-update` feature, 
+it is possible to control Rustup's automatic self update mechanism with the `auto-self-update` configuration variable. 
+This setting supports three values: `enable` and `disable` and `check-only`.
 
 * `disable` will ensure that no automatic self updating actions are taken.
 * `enable` will mean that `rustup update` and similar commands will also check-for, and install, any update to Rustup.
 * `check-only` will cause any automatic self update to check and report on any updates, but not to automatically install them.
 
-Whether automatic self-update is enabled or not, you can request that Rustup check for, and update itself to the
+Whether `auto-self-update` is `enable` or not, you can request that Rustup check for, and update itself to the
 latest version of `rustup` without updating any installed toolchains by running `rustup
 self update`:
 
@@ -50,7 +51,7 @@ info: downloading self-updates
 ```
 
 > ### Disable automatic self-updates with the parameter of the command
-> If auto-self-update is `enable`, `rustup` will automatically update itself at the end of any
+> Since the default value of auto-self-update is `enable`, `rustup` will automatically update itself at the end of any
 > toolchain installation as well.  You can prevent this automatic behaviour by
 > passing the `--no-self-update` argument when running `rustup update` or
 > `rustup toolchain install`.