Fix wording on admin instances view, fix typos in language detector spec (#2106)

config/locales/en.yml

@@ -115,9 +115,9 @@ en:
       title: Domain Blocks
       undo: Undo
     instances:
-      account_count: Accounts
+      account_count: Known accounts
-      domain_name: Domain name
+      domain_name: Domain
-      title: Instances
+      title: Known Instances
     pubsubhubbub:
       callback_url: Callback URL
       confirmed: Confirmed

spec/lib/language_detector_spec.rb

@@ -1,24 +1,23 @@
 # frozen_string_literal: true
-
 require 'rails_helper'
 
 describe LanguageDetector do
   describe 'to_iso_s' do
     it 'detects english language' do
-      string = 'Hello and welcome to mastadon'
+      string = 'Hello and welcome to mastodon'
       result = described_class.new(string).to_iso_s
 
       expect(result).to eq :en
     end
 
     it 'detects spanish language' do
-      string = 'Obtener un Hola y bienvenidos a Mastadon'
+      string = 'Obtener un Hola y bienvenidos a Mastodon'
       result = described_class.new(string).to_iso_s
 
       expect(result).to eq :es
     end
 
-    describe 'when language cant be detected' do
+    describe 'when language can\'t be detected' do
       it 'confirm language engine cant detect' do
         result = WhatLanguage.new(:all).language_iso('')
         expect(result).to be_nil