Update the bug report template

.github/ISSUE_TEMPLATE/bug-report.md

@@ -8,23 +8,23 @@ assignees: ''
 ---
 
 * `zsh-autocomplete` version: <!-- git -C ~zsh-autocomplete rev-parse @ -->
-* Zsh version: <!-- print $ZSH_PATCHLEVEL -->
+* Zsh version: <!-- print =zsh $ZSH_PATCHLEVEL -->
 * Framework: <!-- Oh My Zsh, Prezto, Zimfw, etc. or just "none" -->
 * Plugin manager: <!-- Znap, Zinit, Antigen, etc. or just "none" -->
 * Operating system: <!-- print $OSTYPE -->
 
- 1. Paste the following into your terminal and <kbd>Enter</kbd>:
+ 1. Paste the following into your terminal and press <kbd>Enter</kbd>:
     ```zsh
     cd $(mktemp -d)
     git clone --depth 1 -- https://github.com/marlonrichert/zsh-autocomplete.git
-    print '
-    PS1="%# " PS2="  " RPS2="< %^"; setopt transientrprompt
-    source zsh-autocomplete/zsh-autocomplete.plugin.zsh
+    print 'PS1="%# " PS2="  " RPS2="< %^"; setopt transientrprompt
+    source ~/zsh-autocomplete/zsh-autocomplete.plugin.zsh
     ' > .zshrc
-    exec env -i HOME=$PWD TERM=$TERM SHELL=$SHELL $SHELL -d
+    SHELL==zsh
+    exec -c zsh -fc "HOME=$PWD SHELL=$SHELL TERM=$TERM exec $SHELL -d"
     ```
- 1. In the shell session created above, try to reproduce your problem and
-    record all of it here:
+ 1. Once you're able to reproduce your problem in the shell session created
+    above, copy-paste the contents of your terminal here:
     ```zsh
     % # Copy-paste your shell session here.
     ```