Replace =~ with #matches?. #208.

=~ made sense when we were passing it through to a regex, but we're no
longer doing that: TagMatcher looks at individual tags and returns a
value that *looks* like what you get out of #=~ but really isn't that
meaningful.  Probably a good idea to not subvert convention like this
and instead use a name with guessable intent.

spec/models/glitch/keyword_mute_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       end
 
       it 'does not match' do
-        expect(matcher =~ 'This is a hot take').to be_falsy
+        expect(matcher.matches?('This is a hot take')).to be_falsy
       end
     end
 
@@ -21,75 +21,75 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       it 'does not match keywords set by a different account' do
         Glitch::KeywordMute.create!(account: bob, keyword: 'take')
 
-        expect(matcher =~ 'This is a hot take').to be_falsy
+        expect(matcher.matches?('This is a hot take')).to be_falsy
       end
 
       it 'does not match if no keywords match the status text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'cold')
 
-        expect(matcher =~ 'This is a hot take').to be_falsy
+        expect(matcher.matches?('This is a hot take')).to be_falsy
       end
 
       it 'considers word boundaries when matching' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'bob', whole_word: true)
 
-        expect(matcher =~ 'bobcats').to be_falsy
+        expect(matcher.matches?('bobcats')).to be_falsy
       end
 
       it 'matches substrings if whole_word is false' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take', whole_word: false)
 
-        expect(matcher =~ 'This is a shiitake mushroom').to be_truthy
+        expect(matcher.matches?('This is a shiitake mushroom')).to be_truthy
       end
 
       it 'matches keywords at the beginning of the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take')
 
-        expect(matcher =~ 'Take this').to be_truthy
+        expect(matcher.matches?('Take this')).to be_truthy
       end
 
       it 'matches keywords at the end of the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take')
 
-        expect(matcher =~ 'This is a hot take').to be_truthy
+        expect(matcher.matches?('This is a hot take')).to be_truthy
       end
 
       it 'matches if at least one keyword case-insensitively matches the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
 
-        expect(matcher =~ 'This is a HOT take').to be_truthy
+        expect(matcher.matches?('This is a HOT take')).to be_truthy
       end
 
       it 'maintains case-insensitivity when combining keywords into a single matcher' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
         Glitch::KeywordMute.create!(account: alice, keyword: 'cold')
 
-        expect(matcher =~ 'This is a HOT take').to be_truthy
+        expect(matcher.matches?('This is a HOT take')).to be_truthy
       end
 
       it 'matches keywords surrounded by non-alphanumeric ornamentation' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
 
-        expect(matcher =~ '(hot take)').to be_truthy
+        expect(matcher.matches?('(hot take)')).to be_truthy
       end
 
       it 'escapes metacharacters in keywords' do
         Glitch::KeywordMute.create!(account: alice, keyword: '(hot take)')
 
-        expect(matcher =~ '(hot take)').to be_truthy
+        expect(matcher.matches?('(hot take)')).to be_truthy
       end
 
       it 'uses case-folding rules appropriate for more than just English' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'großeltern')
 
-        expect(matcher =~ 'besuch der grosseltern').to be_truthy
+        expect(matcher.matches?('besuch der grosseltern')).to be_truthy
       end
 
       it 'matches keywords that are composed of multiple words' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'a shiitake')
 
-        expect(matcher =~ 'This is a shiitake').to be_truthy
-        expect(matcher =~ 'This is shiitake').to_not be_truthy
+        expect(matcher.matches?('This is a shiitake')).to be_truthy
+        expect(matcher.matches?('This is shiitake')).to_not be_truthy
       end
     end
   end