Auto-fix more Layout/IndentationWidth offenses

- These didn't appear in the first pass as the other offense fixes caused them.

Library/Homebrew/formula_installer.rb

@@ -370,7 +370,7 @@ class FormulaInstaller
       $stderr.puts "Please report this to the #{formula.tap} tap!"
       false
                 else
-      f.linked_keg.exist? && f.opt_prefix.exist?
+                  f.linked_keg.exist? && f.opt_prefix.exist?
     end
 
     raise FormulaConflictError.new(formula, conflicts) unless conflicts.empty?

Library/Homebrew/utils/fork.rb

@@ -54,7 +54,7 @@ module Utils
 
           exit!
               else
-          exit!(true)
+                exit!(true)
         end
 
         ignore_interrupts(:quietly) do # the child will receive the interrupt and marshal it back