Move `Formatter.columns` into `utils/formatter`.

Library/Homebrew/utils/formatter.rb

-require "utils/formatter/columns"
 require "utils/tty"
 
 module Formatter
@@ -50,4 +49,45 @@ module Formatter
     end
   end
   private_class_method :prefix
+
+  def columns(*objects, gap_size: 2)
+    objects = objects.flatten.map(&:to_s)
+
+    fallback = proc do
+      return objects.join("\n").concat("\n")
+    end
+
+    fallback.call if objects.empty?
+    fallback.call if respond_to?(:tty?) ? !tty? : !$stdout.tty?
+
+    console_width = Tty.width
+    object_lengths = objects.map { |obj| Tty.strip_ansi(obj).length }
+    cols = (console_width + gap_size) / (object_lengths.max + gap_size)
+
+    fallback.call if cols < 2
+
+    rows = (objects.count + cols - 1) / cols
+    cols = (objects.count + rows - 1) / rows # avoid empty trailing columns
+
+    col_width = (console_width + gap_size) / cols - gap_size
+
+    gap_string = "".rjust(gap_size)
+
+    output = ""
+
+    rows.times do |row_index|
+      item_indices_for_row = row_index.step(objects.size - 1, rows).to_a
+
+      first_n = item_indices_for_row[0...-1].map { |index|
+        objects[index] + "".rjust(col_width - object_lengths[index])
+      }
+
+      # don't add trailing whitespace to last column
+      last = objects.values_at(item_indices_for_row.last)
+
+      output.concat((first_n + last).join(gap_string)).concat("\n")
+    end
+
+    output
+  end
 end

Library/Homebrew/utils/formatter/columns.rb

-require "utils/tty"
-
-module Formatter
-  module_function
-
-  def columns(*objects, gap_size: 2)
-    objects = objects.flatten.map(&:to_s)
-
-    fallback = proc do
-      return objects.join("\n").concat("\n")
-    end
-
-    fallback.call if objects.empty?
-    fallback.call if respond_to?(:tty?) ? !tty? : !$stdout.tty?
-
-    console_width = Tty.width
-    object_lengths = objects.map { |obj| Tty.strip_ansi(obj).length }
-    cols = (console_width + gap_size) / (object_lengths.max + gap_size)
-
-    fallback.call if cols < 2
-
-    rows = (objects.count + cols - 1) / cols
-    cols = (objects.count + rows - 1) / rows # avoid empty trailing columns
-
-    col_width = (console_width + gap_size) / cols - gap_size
-
-    gap_string = "".rjust(gap_size)
-
-    output = ""
-
-    rows.times do |row_index|
-      item_indices_for_row = row_index.step(objects.size - 1, rows).to_a
-
-      first_n = item_indices_for_row[0...-1].map { |index|
-        objects[index] + "".rjust(col_width - object_lengths[index])
-      }
-
-      # don't add trailing whitespace to last column
-      last = objects.values_at(item_indices_for_row.last)
-
-      output.concat((first_n + last).join(gap_string)).concat("\n")
-    end
-
-    output
-  end
-end