Update readme and gemspec url and usage

Author: tompng

README.md

@@ -31,9 +31,9 @@ ReplTypeCompletor.load_rbs # Could take a seconds in large projects
 Now you can get completion candidates.
 ```ruby
 array = [1, 2, 3]
-class String; def upupup; end; end
-result = ReplTypeCompletor.analyze('array.map do str = _1.chr; str.up', binding: binding)
-result.completion_candidates #=> ["case", "case!", "to", "upup"]
+code_to_complete = 'array.map do str = _1.chr; str.up'
+result = ReplTypeCompletor.analyze(code_to_complete, binding: binding, filename: __FILE__)
+result.completion_candidates #=> ["case", "case!", "to"]
 result.doc_namespace('case') #=> "String#upcase"
 ```
 
@@ -45,7 +45,7 @@ To install this gem onto your local machine, run `bundle exec rake install`. To
 
 ## Contributing
 
-Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/repl_type_completor.
+Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/repl_type_completor.
 
 When something is wrong, these methods will provide some debug information.
 ```ruby
@@ -54,7 +54,7 @@ ReplTypeCompletor.rbs_load_started?
 ReplTypeCompletor.rbs_loaded?
 ReplTypeCompletor.rbs_load_error
 ReplTypeCompletor.last_completion_error
-ReplTypeCompletor.analyze(code_to_complete, binding: binding)
+ReplTypeCompletor.analyze(code_to_complete, binding: binding, filename: __FILE__)
 ```
 
 ## License

repl_type_completor.gemspec

@@ -10,15 +10,15 @@ Gem::Specification.new do |spec|
 
   spec.summary = "Type based completion for REPL."
   spec.description = "Type based completion for REPL."
-  # spec.homepage = "TODO: Put your gem's website or public repo URL here."
+  spec.homepage = "https://github.com/ruby/repl_type_completor"
   spec.license = "MIT"
   spec.required_ruby_version = ">= 3.0.0"
 
   spec.metadata["allowed_push_host"] = "TODO: Set to your gem server 'https://example.com'"
 
-  # spec.metadata["homepage_uri"] = spec.homepage
-  # spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
-  # spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "https://github.com/ruby/repl_type_completor"
+  spec.metadata["documentation_uri"] = spec.homepage
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.