Fix Gruff::Line to prevent unknown lines drawing #519
ci.yml
on: pull_request
  
      
        Matrix: lint
      
    
    
      
        Matrix: RBS
      
    
    
      
        Matrix: test-jruby
      
    
    
      
        Matrix: test-ruby
      
    
    Annotations
17 errors
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                          Lint (Ruby 3.4, ImageMagick 7.1)
                        
                      
                       
                  The operation was canceled. 
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                          Check RBS (Ruby 3.4, ImageMagick 7.1)
                        
                      
                       
                  The operation was canceled. 
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                          Lint (Ruby 3.4, ImageMagick 7.1)
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Check RBS (Ruby 3.4, ImageMagick 7.1)
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          JRuby 9.4.7.0
                        
                      
                       
                  The operation was canceled. 
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                          JRuby 9.4.7.0
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Ruby 3.4
                        
                      
                       
                  The operation was canceled. 
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                          Ruby 3.4
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Ruby 3.1
                        
                      
                       
                  The operation was canceled. 
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                          Ruby 3.1
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Ruby 3.2
                        
                      
                       
                  The operation was canceled. 
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                          Ruby 3.2
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Ruby 3.3
                        
                      
                       
                  The operation was canceled. 
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                          Ruby 3.3
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          Ruby 3.0
                        
                      
                       
                  The operation was canceled. 
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                          Ruby 3.0
                        
                      
                       
                  The run was canceled by @Watson1978. 
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                          CI
                        
                      
                       
                  The run was canceled by @Watson1978. 
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