Clean up docs for Rails::Generators::ActiveModel [ci-skip]

Without additional formatting, these method docs render as a single
line.  For example,

  ```ruby
  # GET show
  # GET edit
  # PATCH/PUT update
  # DELETE destroy
  ```

renders as

  ```html
  <p>GET show GET edit PATCH/PUT update DELETE destroy</p>
  ```

Author: jonathanhefner

railties/lib/rails/generators/active_model.rb

@@ -32,21 +32,27 @@ def initialize(name)
         @name = name
       end
 
-      # GET index
+      # Used for:
+      #
+      # * GET +index+
       def self.all(klass)
         "#{klass}.all"
       end
 
-      # GET show
-      # GET edit
-      # PATCH/PUT update
-      # DELETE destroy
+      # Used for:
+      #
+      # * GET +show+
+      # * GET +edit+
+      # * PATCH / PUT +update+
+      # * DELETE +destroy+
       def self.find(klass, params = nil)
         "#{klass}.find(#{params})"
       end
 
-      # GET new
-      # POST create
+      # Used for:
+      #
+      # * GET +new+
+      # * POST +create+
       def self.build(klass, params = nil)
         if params
           "#{klass}.new(#{params})"
@@ -55,23 +61,31 @@ def self.build(klass, params = nil)
         end
       end
 
-      # POST create
+      # Used for:
+      #
+      # * POST +create+
       def save
         "#{name}.save"
       end
 
-      # PATCH/PUT update
+      # Used for:
+      #
+      # * PATCH / PUT +update+
       def update(params = nil)
         "#{name}.update(#{params})"
       end
 
-      # POST create
-      # PATCH/PUT update
+      # Used for:
+      #
+      # * POST +create+
+      # * PATCH / PUT +update+
       def errors
         "#{name}.errors"
       end
 
-      # DELETE destroy
+      # Used for:
+      #
+      # * DELETE +destroy+
       def destroy
         "#{name}.destroy!"
       end