message: Minor update to tracking issue template.
diff: @@ -10,15 +10,9 @@ accepted feature or RFC from implementation to stabilization. Please do not
  file a tracking issue until the feature or RFC has been approved.
  -->
  -**About tracking issues**
  -
  -Tracking issues are used to record the overall progress of implementation.
  -They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
  -A tracking issue is however *not* meant for large scale discussion, questions, or bug reports about a feature.
  -Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.
  -
  **Summary**
  +RFC: [#NNNN](https://github.com/rust-lang/rfcs/pull/NNNN) <!-- If this is an RFC -->
  Original issue: #NNNN <!-- if there is a related issue that spawned this feature -->
  Implementation: #NNNN <!-- link to the PR that implemented this feature if applicable -->
  Documentation: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#my-feature
  @@ -32,3 +26,10 @@ Documentation: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#m
  **Future extensions**
  <!-- An optional section where you can mention where the feature may be extended in the future, but is explicitly not intended to address. -->
  +
  +**About tracking issues**
  +
  +Tracking issues are used to record the overall progress of implementation.
  +They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
  +A tracking issue is however *not* meant for large scale discussion, questions, or bug reports about a feature.
  +Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.
  