Improve markdown formatting of ISSUE_TEMPLATE

.github/ISSUE_TEMPLATE.md

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+Where is the project currently hosted?
+
+> https://github.com/foo/bar
+> 
+
+What languages other than Go does the project utilize?
+
+> `make` and `bash` for building
+> 
+
+When was the project's last activity?
+
+> Feb 3, 1991
+> 
+
+Does the project have a maintainer, or a maintainer looking for someone to take over the project?
+
+> The current maintainer...
+> 
+
+What active projects replicate the popular functionality of this project, if any?
+
+> There's github.com/baz/bar but it's really incomplete.
+> There's also github.com/quz/bar but it's also unmaintained.
+> 
+
+What are some example projects that make use of this package?
+
+> My project github.com/zzz/yyy uses it heavily.
+> github.com/www/uuu imports it and has 300 stars.
+> 
+
+Are there any outstanding **_critical_** bugs that result in the library being totally unusable or insecure?
+
+> There's issue #xyz/not at this time
+> 
+
+Please provide a link to the project importers from https://godoc.org.
+
+> Example: https://godoc.org/github.com/gofrs/uuid?importers
+> 
+
+What else would you like to mention about the project?
+
+> Of the packages trying to provide this functionality, this is the cleanest. It's lacking in...
+>