Merge pull request #8670 from mistydemeo/fix_multiple_version_messaging

Fix printing MultipleVersionsInstalledError details

Library/Homebrew/cli/named_args.rb

@@ -164,7 +164,10 @@ module Homebrew
             end
 
             unless (prefix = f.latest_installed_prefix).directory?
-              raise MultipleVersionsInstalledError, "#{rack.basename} has multiple installed versions"
+              raise MultipleVersionsInstalledError, <<~EOS
+                #{rack.basename} has multiple installed versions
+                Run `brew uninstall --force #{rack.basename}` to remove all versions.
+              EOS
             end
 
             Keg.new(prefix)

Library/Homebrew/cmd/uninstall.rb

@@ -134,7 +134,6 @@ module Homebrew
     )
   rescue MultipleVersionsInstalledError => e
     ofail e
-    puts "Run `brew uninstall --force #{e.name}` to remove all versions."
   ensure
     # If we delete Cellar/newname, then Cellar/oldname symlink
     # can become broken and we have to remove it.

Library/Homebrew/test/exceptions_spec.rb

@@ -3,9 +3,19 @@
 require "exceptions"
 
 describe MultipleVersionsInstalledError do
-  subject { described_class.new("foo has multiple installed versions") }
+  subject {
+    described_class.new <<~EOS
+      foo has multiple installed versions
+      Run `brew uninstall --force foo` to remove all versions.
+    EOS
+  }
 
-  its(:to_s) { is_expected.to eq("foo has multiple installed versions") }
+  its(:to_s) {
+    is_expected.to eq <<~EOS
+      foo has multiple installed versions
+      Run `brew uninstall --force foo` to remove all versions.
+    EOS
+  }
 end
 
 describe NoSuchKegError do