Fixes rust-lang#924 Addressed comments

Author: igaray

src/about-this-guide.md

@@ -45,7 +45,9 @@ If you find any mistakes in the guide, please file an issue about it, or even be
 a correction!
 
 If you do contribute to the guide, please see the corresponding
-[subsection on writing documentation in this guide](contributing.md#contributing-to-rustc-dev-guide).
+[subsection on writing documentation in this guide].
+
+[subsection on writing documentation in this guide]: contributing.md#contributing-to-rustc-dev-guide.
 
 > “‘All conditioned things are impermanent’ — when one sees this with wisdom, one turns away from
 > suffering.” _The Dhammapada, verse 277_

src/contributing.md

@@ -403,11 +403,10 @@ The CSS might be messed up, but you can verify that the HTML is right.
 
 ### Contributing to rustc-dev-guide
 
-Additionally, contributions to the [rustc-dev-guide][rdg] are always welcome.
-Contributions can be made directly at [the rust-lang/rustc-dev-guide
-repo][rdgrepo]. The issue tracker in that repo is also a great way to find
-things that need doing. There are issues for beginners and advanced compiler
-devs alike!
+Contributions to the [rustc-dev-guide][rdg] are always welcome, and can be made directly at
+[the rust-lang/rustc-dev-guide repo][rdgrepo].
+The issue tracker in that repo is also a great way to find things that need doing.
+There are issues for beginners and advanced compiler devs alike!
 
 Just a few things to keep in mind:
 
@@ -417,8 +416,8 @@ Just a few things to keep in mind:
   Aim to provide a reasonable amount of context, possibly including but not limited to:
   - A reason for why the data may be out of date other than "change", as change is a constant across
     the project.
-  - A date the comment was added, e.g. instead of writing _"Currently, ..."_, or
-    _"In the future, ..."_, consider writing _"As of January 2021, ..."_.
+  - A date the comment was added, e.g. instead of writing _"Currently, ..."_ consider writing
+    _"As of January 2021, ..."_.
     Try to format the date as `<MONTH> <YEAR>` to ease search.
   - A link to a relevant WG, tracking issue, `rustc` rustdoc page, or similar, that may provide
     further explanation for the change process or a way to verify that the information is not