formatting improvements to upgrade guides

doc/update/6.0-to-7.3.md

@@ -9,7 +9,7 @@ As of 6.1 issue numbers are project specific. This means all issues are renumber
 ## Editable labels
 
 In GitLab 7.2 we replace Issue and Merge Request tags with labels, making it
-possible to edit the label text and color. The characters '?', '&' and ',' are
+possible to edit the label text and color. The characters `?`, `&` and `,` are
 no longer allowed however so those will be removed from your tags during the
 database migrations for GitLab 7.2.
 
@@ -148,7 +148,7 @@ sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 
 ## 8. Update config files
 
-TIP: to see what changed in gitlab.yml.example in this release use next command:
+TIP: to see what changed in `gitlab.yml.example` in this release use next command:
 
 ```
 git diff 6-0-stable:config/gitlab.yml.example 7-3-stable:config/gitlab.yml.example

doc/update/7.1-to-7.2.md

@@ -3,7 +3,7 @@
 ## Editable labels
 
 In GitLab 7.2 we replace Issue and Merge Request tags with labels, making it
-possible to edit the label text and color. The characters '?', '&' and ',' are
+possible to edit the label text and color. The characters `?`, `&` and `,` are
 no longer allowed however so those will be removed from your tags during the
 database migrations for GitLab 7.2.
 
@@ -81,9 +81,9 @@ sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 
 ### 6. Update config files
 
-#### New configuration options for gitlab.yml
+#### New configuration options for `gitlab.yml`
 
-There are new configuration options available for gitlab.yml. View them with the command below and apply them to your current gitlab.yml.
+There are new configuration options available for `gitlab.yml`. View them with the command below and apply them to your current `gitlab.yml`.
 
 ```
 git diff 7-1-stable:config/gitlab.yml.example 7-2-stable:config/gitlab.yml.example