Added issue template for maintenance tasks.

Author: john-hen

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,10 +1,6 @@
 ---
-name: Bug report
+name:  Bug report
 about: Report unintended behavior you've experienced.
-title: ''
-labels: ''
-assignees: ''
-
 ---
 
 <!--
@@ -15,7 +11,5 @@ assignees: ''
 - Describe the expected behavior if not obvious.
 - Pick a descriptive issue title tailored to your bug report.
 
-(*) Preferably, use the demonstration model from the Tutorial (capacitor.mph)
-to demonstrate the bug. You can attach a model file to your post, though you
-may have to "zip" it or change its file extension for the upload to go through.
+(*) Preferably, use the demonstration model from the Tutorial (capacitor.mph) to demonstrate the bug. You can attach a model file to your post, though you may have to "zip" it or change its file extension for the upload to go through.
 -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,24 +1,14 @@
 ---
-name: Feature request
+name:  Feature request
 about: Suggest a new feature you want to contribute.
-title: ''
-labels: ''
-assignees: ''
-
 ---
 
 <!--
-A new feature is a function/method to be added to the library.
-Something new that would appear in the "API" chapter of the documentation:
+A new feature is a function/method to be added to the library. Something new that would appear in the "API" chapter of the documentation:
 https://mph.readthedocs.io/en/stable/api.html
 Or an extension of the behavior of an existing API method/function.
 
-Describe the feature you want to implement. Ideally, use the demonstration
-model from the Tutorial (capacitor.mph) to showcase it. You can attach a model
-file to your post, though you may have to "zip" it or change its file extension
-for the upload to go through.
+Describe the feature you want to implement. Ideally, use the demonstration model from the Tutorial (capacitor.mph) to showcase it. You can attach a model file to your post, though you may have to "zip" it or change its file extension for the upload to go through.
 
-Please note that this library is being actively maintained, but not actively
-developed. It's best to only suggest features that you're planning to
-contribute yourself.
+Please note that this library is being actively maintained, but not actively developed. It's best to only suggest features that you're planning to contribute yourself.
 -->

.github/ISSUE_TEMPLATE/maintenance_task.md

@@ -0,0 +1,10 @@
+---
+name:  Maintenance task
+about: Suggest a maintenance task you think is due.
+---
+
+<!--
+A maintenance task is something like running the test suite with a Comsol version that has been newly released. Or fixing the tests to make them pass with that new Comsol release. Or updating the documentation accordingly. Or anything else intended to maintain the status quo.
+
+Please don't suggest maintenance tasks for others to do unless you have previously taken care of such things yourself. But feel free to make others aware of maintenance that you plan to handle on your own.
+-->