Rollup merge of #25857 - killercup:patch-14, r=steveklabnik

Thanks to @cers who reported this in killercup/trpl-ebook#14!

r? @steveklabnik

Author: steveklabnik

src/doc/trpl/conditional-compilation.md

@@ -34,7 +34,7 @@ These can nest arbitrarily:
 As for how to enable or disable these switches, if you’re using Cargo,
 they get set in the [`[features]` section][features] of your `Cargo.toml`:
 
-[features]: http://doc.crates.io/manifest.html#the-[features]-section
+[features]: http://doc.crates.io/manifest.html#the-%5Bfeatures%5D-section
 
 ```toml
 [features]