issue template: improve the "installation difficulties" template

to reflect the questions I ask when problems get really nutty

.github/ISSUE_TEMPLATE/installation-difficulties.md

@@ -9,22 +9,58 @@ assignees: ''
 
 **Have you read and followed the installation tutorial at http://www.nokogiri.org/tutorials/installing_nokogiri.html?**
 
-**What is the complete output of `gem install`?**
+- [ ] Yes!
 
-Please make sure to escape the file contents with triple-backticks.
+
+**What is the complete output of `gem install` or `bundle install`?**
+
+<!-- Please make sure to escape the file contents with triple-backticks. -->
+
+```
+your output goes here
+```
 
 
 **What are the complete contents of the `mkmf.log` file generated during the failed installation?**
 
-Please make sure to escape the file contents with triple-backticks.
+<!-- Please make sure to escape the file contents with triple-backticks. -->
+
+```
+your mkmf.log file contents go here
+```
+
+
+**Tell us about your system!**
+
+What is the output from `ruby -v`?
+
+What is the output from `gem -v`?
+
+What is the output from `gem env`?
+
+```
+gem env output goes here
+```
 
 
-**What operating system are you using?**
+If you're using Bundler:
+- what is the output from `bundle version`?
+- what is the output from `bundle config`? (Take care to redact any credentials)
 
-Are you using Linux, MacOS, Windows, a BSD variant, or something else entirely?
+```
+bundle config output goes here
+```
 
-If MacOS, please note the version of XCode you have installed.
+If you're on MacOS, please note:
+- the version of XCode you have installed (if you know)
+- the output of `gcc -v` or `clang -v`
 
-If Linux, please include the output of `uname -a` and the contents of `/etc/lsb-release`.
+If Linux or a BSD variant, please note:
+- the distro you're using
+- the output of `uname -a`
+- the contents of `/etc/lsb-release`.
 
-If Windows, please note whether you're installing the precompiled gems, or compiling yourself with DevKit. Also please note the version of RubyInstaller you've installed.
+If Windows, please note:
+- whether you're installing the precompiled gems, or compiling yourself with DevKit
+- the version of RubyInstaller you've installed
+- or if you're not using RubyInstaller, how did you install Ruby?