Use bold to highlight 'Failure/Error'

...instead of white, as it doesn't show up well on light color schemes.

Author: mcmire

lib/super_diff/csi.rb

@@ -1,6 +1,7 @@
 # Source: <https://en.wikipedia.org/wiki/ANSI_escape_code>
 module SuperDiff
   module Csi
+    autoload :BoldSequence, "super_diff/csi/bold_sequence"
     autoload :Color, "super_diff/csi/color"
     autoload :ColorSequenceBlock, "super_diff/csi/color_sequence_block"
     autoload :ColorizedDocument, "super_diff/csi/colorized_document"

lib/super_diff/csi/bold_sequence.rb

@@ -0,0 +1,9 @@
+module SuperDiff
+  module Csi
+    class BoldSequence
+      def to_s
+        "\e[1m"
+      end
+    end
+  end
+end

lib/super_diff/csi/document.rb

@@ -16,6 +16,10 @@ def each(&block)
         parts.each(&block)
       end
 
+      def bold(*args, **opts, &block)
+        colorize(BoldSequence.new, *args, **opts, &block)
+      end
+
       def colorize(*args, **opts, &block)
         contents, colors = args.partition do |arg|
           arg.is_a?(String) || arg.is_a?(self.class)
@@ -110,10 +114,12 @@ def derive_request_from(name)
         match = name.to_s.match(/\A(.+)_line\Z/)
 
         if match
-          if respond_to?(match[1].to_sym)
-            MethodRequest.new(name: match[1].to_sym, line: true)
-          elsif Csi::Color.exists?(match[1].to_sym)
-            ColorRequest.new(name: match[1].to_sym, line: true)
+          color_name = match[1].to_sym
+
+          if respond_to?(color_name)
+            MethodRequest.new(name: color_name, line: true)
+          elsif Csi::Color.exists?(color_name)
+            ColorRequest.new(name: color_name, line: true)
           end
         elsif Csi::Color.exists?(name.to_sym)
           ColorRequest.new(name: name.to_sym, line: false)

lib/super_diff/rspec/monkey_patches.rb

@@ -111,10 +111,7 @@ def add_shared_group_lines(lines, colorizer)
         def failure_slash_error_lines
           lines = read_failed_lines
 
-          failure_slash_error = ConsoleCodes.wrap(
-            "Failure/Error: ",
-            :white
-          )
+          failure_slash_error = ConsoleCodes.wrap("Failure/Error: ", :bold)
 
           if lines.count == 1
             lines[0] = failure_slash_error + lines[0].strip

spec/support/integration/helpers.rb

@@ -114,7 +114,7 @@ def build_expected_output(
         line "1) test passes", indent_by: 2
 
         line indent_by: 5 do
-          white "Failure/Error: "
+          bold "Failure/Error: "
           plain snippet
         end