Update ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -1,15 +1,14 @@
-Please check the existing issues to make sure you're not duplicating a report.
-
 For bug reports, please provide the following information:
 
-In a terminal, run `zimfw info` and paste the output below:
+- [ ] I've checked the [existing issues](https://github.com/zimfw/zimfw/issues?q=is%3Aissue) to make sure I'm not duplicating a report.
+- [ ] I've pasted the output of `zimfw info` below.
+- [ ] I was able to reproduce the issue with a clean installation of Zim.
 
-```
+zimfw info
-#Paste the output here
+----------
-```
+<pre>
-
+# In a terminal, run <b>zimfw info</b>, and paste the output here.
-- gist of .zimrc:
+</pre>
-- gist of .zshrc:
 
 Description
 -----------
@@ -17,9 +16,13 @@ Description
 
 Steps to reproduce
 ------------------
-
+(The fist 4 steps restart the shell with a clean installation of Zim in a temporary directory.)
+1. `cd ${$(mktemp -d):A}`
+2. `ZDOTDIR=${PWD} HOME=${PWD} ZIM_HOME=${PWD}/.zim exec zsh`
+3. `curl -fsSL https://raw.githubusercontent.com/zimfw/install/master/install.zsh | zsh`
+5. `exec zsh`
+6. Other steps to reproduce. Use `exec zsh` when restaring the terminal or restarting the shell is needed.
 
 Images or other information
 ---------------------------
 
-