ISSUE_TEMPLATE: more tweaks.

- note we don't want cask issues here (again)
- harden closing issue without comment disclaimer

.github/ISSUE_TEMPLATE.md

@@ -1,11 +1,11 @@
 # Please always follow these steps:
-- [ ] Confirmed this is a problem with `brew install`ing one, specific formula and not every time you run `brew`? If it's a general `brew` problem please file this issue at https://github.com/Homebrew/brew/issues/new. If it's a `brew cask` problem please file this issue at https://github.com/Homebrew/caskroom/homebrew-cask/new
+- [ ] Confirmed this is a problem with `brew install`ing one, specific formula (not cask) and not every time you run `brew`? If it's a general `brew` problem please file this issue at https://github.com/Homebrew/brew/issues/new. If it's a `brew cask` problem please file this issue at https://github.com/Homebrew/caskroom/homebrew-cask/new
 - [ ] Ran `brew update` and retried your prior step?
 - [ ] Ran `brew doctor`, fixed all issues and retried your prior step?
 - [ ] Ran `brew gist-logs <formula>` (where `<formula>` is the name of the formula that failed) and included the output link?
 - [ ] If `brew gist-logs` didn't work: ran `brew config` and `brew doctor` and included their output with your issue?
 
-**Please note we may immediately close your issue without comment if you delete or do not fill out the issue checklist and provide ALL the requested information.**
+**Please note we will close your issue without comment if you delete or do not fill out the issue checklist and provide ALL the requested information.**
 
 To help us debug your issue please explain:
 - What you were trying to do (and why)