With auto-user-install feature, no warning about install directory not being in PATH

[duckinator]

Describe the problem as clearly as you can

If the installation directory isn't in my $PATH, RubyGems doesn't warn me -- but I thought it previously did that.

Did you try upgrading RubyGems?

Using master, as of 8072d99.

Post steps to reproduce the problem

• Install RubyGems from source (I know 8072d99 is affected).
• Do not set GEM_HOME.
• Ensure you don't have write access to the normal install directory.
• gem install boop

Which command did you run?

gem install boop

What were you expecting to happen?

I expected it to say it defaulted to user installation, then say the bin path isn't writable.

What actually happened?

puppy@orthrus:~$ gem install boop
Defaulting to user installation because default installation directory (/usr/local/lib/ruby/gems/3.1) is not writable.
Fetching boop-0.5.0.gem
Successfully installed boop-0.5.0
1 gem installed
puppy@orthrus:~$ echo $PATH
/home/puppy/.cargo/bin:/home/puppy/bin:/home/puppy/.local/bin:/home/puppy/.gem/ruby/bin:/home/puppy/.npm-global/bin:/home/puppy/go/bin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin
puppy@orthrus:~$

Run gem env and paste the output below

Defaulting to user installation because default installation directory (/usr/local/lib/ruby/gems/3.1) is not writable.
RubyGems Environment:
  - RUBYGEMS VERSION: 3.5.0.dev
  - RUBY VERSION: 3.1.4 (2023-03-30 patchlevel 223) [amd64-freebsd13]
  - INSTALLATION DIRECTORY: /usr/home/puppy/.gem/ruby/3.1
  - USER INSTALLATION DIRECTORY: /home/puppy/.gem/ruby/3.1
  - RUBY EXECUTABLE: /usr/local/bin/ruby31
  - GIT EXECUTABLE: /usr/local/bin/git
  - EXECUTABLE DIRECTORY: /usr/home/puppy/.gem/ruby/3.1/bin
  - SPEC CACHE DIRECTORY: /home/puppy/.local/share/gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /usr/local/etc
  - RUBYGEMS PLATFORMS:
     - ruby
     - amd64-freebsd-13
  - GEM PATHS:
     - /usr/home/puppy/.gem/ruby/3.1
     - /usr/local/lib/ruby/gems/3.1
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => true
     - :bulk_threshold => 1000
     - "gem" => "--suggestions --no-document"
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /home/puppy/.cargo/bin
     - /home/puppy/bin
     - /home/puppy/.local/bin
     - /home/puppy/.gem/ruby/bin
     - /home/puppy/.npm-global/bin
     - /home/puppy/go/bin
     - /bin
     - /usr/bin
     - /sbin
     - /usr/sbin
     - /usr/local/bin
     - /usr/local/sbin

[duckinator]

Turns out @voxik fixed this in #7100. With that PR, I now get:

puppy@orthrus:~/test$ gem install boop
Defaulting to user installation because default installation directory (/usr/local/lib/ruby/gems/3.1) is not writable.
Fetching boop-0.5.0.gem
WARNING:  You don't have /home/puppy/.local/share/gem/ruby/3.1/bin in your PATH,
          gem executables will not run.
Successfully installed boop-0.5.0
1 gem installed
puppy@orthrus:~/test$