Slim down init.example.el

Fewer packages to install on first install.

+ Disable multiple-cursors, rotate-text, and ibuffer modules by default;
  these are not essential.
+ Make :ui popup's `+all` flag opt-in (so the popup manager doesn't
  manage buffers without an explicit rule -- which is more disruptive
  than helpful).
+ Make :tools lookup's `+docsets` flag opt-in

init.example.el

@@ -37,9 +37,7 @@
        nav-flash         ; blink the current line after jumping
        ;;neotree           ; a project drawer, like NERDTree for vim
        ophints           ; highlight the region an operation acts on
-       (popup            ; tame sudden yet inevitable temporary windows
-        +all             ; catch all popups that start with an asterix
-        +defaults)       ; default popup rules
+       (popup +defaults)   ; tame sudden yet inevitable temporary windows
        ;;pretty-code       ; replace bits of code with pretty symbols
        ;;tabs              ; an tab bar for Emacs
        ;;treemacs          ; a project drawer, like neotree but cooler
@@ -57,17 +55,17 @@
        ;;(format +onsave)  ; automated prettiness
        ;;god               ; run Emacs commands without modifier keys
        ;;lispy             ; vim for lisp, for people who don't like vim
-       multiple-cursors  ; editing in many places at once
+       ;;multiple-cursors  ; editing in many places at once
        ;;objed             ; text object editing for the innocent
        ;;parinfer          ; turn lisp into python, sort of
-       rotate-text       ; cycle region at point between text candidates
+       ;;rotate-text       ; cycle region at point between text candidates
        snippets          ; my elves. They type so I don't have to
        ;;word-wrap         ; soft wrapping with language-aware indent
 
        :emacs
        dired             ; making dired pretty [functional]
        electric          ; smarter, keyword-based electric-indent
-       ibuffer           ; interactive buffer management
+       ;;ibuffer         ; interactive buffer management
        vc                ; version-control and Emacs, sitting in a tree
 
        :term
@@ -90,8 +88,7 @@
        ;;ein               ; tame Jupyter notebooks with emacs
        (eval +overlay)     ; run code, run (also, repls)
        ;;gist              ; interacting with github gists
-       (lookup           ; helps you navigate your code and documentation
-        +docsets)        ; ...or in Dash docsets locally
+       lookup              ; navigate your code and its documentation
        ;;lsp
        ;;macos             ; MacOS-specific commands
        magit             ; a git porcelain for Emacs