Add section on inverted colors

thebookofcolors

@@ -356,7 +356,27 @@ section_dreaded_blinking_text_of_doom() {
 
 section_inverse() {
 	title "Code 7; Inverse"
-	printf 'TODO\n'
+
+	printf "The inverse attribute causes the foreground and background colors to be flipped.\n"
+	printf "Note that if you use \\\e[7m to flip the colors, you can't then use \\\e[7m to flip them back again. If you want to restore the original colors, you need to set them explicitly again.\n"
+	printf "The lack of this capability makes this attribute somewhat fiddly and superfluous; "
+	thebookofcolors
+	printf "' official recommendation is to always set foreground and background colors explicitly.\n"
+	newline
+
+	subtitle "A Table of Inverted Colors"
+	tableheader "Foreground"
+	printf "                "
+	tableheader "Background"
+	newline
+	printf "\e[7;30m\\\e[7;30m Black\e[0m            \e[7;40m\\\e[7;40m Black\e[0m\n"
+	printf "\e[7;31m\\\e[7;31m Red\e[0m              \e[7;41m\\\e[7;41m Red\e[0m\n"
+	printf "\e[7;32m\\\e[7;32m Green\e[0m            \e[7;42m\\\e[7;42m Green\e[0m\n"
+	printf "\e[7;33m\\\e[7;33m Brown\e[0m            \e[7;43m\\\e[7;43m Brown\e[0m\n"
+	printf "\e[7;34m\\\e[7;34m Blue\e[0m             \e[7;44m\\\e[7;44m Blue\e[0m\n"
+	printf "\e[7;35m\\\e[7;35m Purple\e[0m           \e[7;45m\\\e[7;45m Purple\e[0m\n"
+	printf "\e[7;36m\\\e[7;36m Cyan\e[0m             \e[7;46m\\\e[7;46m Cyan\e[0m\n"
+	printf "\e[7;37m\\\e[7;37m Light grey\e[0m       \e[7;47m\\\e[7;47m Light grey\e[0m\n"
 }
 
 section_using_escape_sequences_in_shell_prompt() {
@@ -447,12 +467,7 @@ main() {
 	#printf '\e[37m[37m Light grey\e[0m       \e[47m[47m Light grey\e[0m\n'
 	#printf '\n'
 
-	#printf '\e[4;37m\e[1;37m1; (Boldness)\e[0m\n'
+	#printf '\e[4;37m\e[1;37mBold Colors\e[0m\n'
-	#printf 'Note that some terminals use the "bold" attribute to display an alternate version of the color, e.g. a lighter or darker shade.\n'
-	#printf 'The canonical names for these alternate colors are what is displayed below.\n'
-	#printf 'Other terminals actually support displaying text with this attribute in a bold typeface.\n'
-	#printf '\n'
-
 	#printf '\e[4;37mForeground\e[0m            \e[4;37mBackground\e[0m\n'
 	#printf '\e[1;30m[1;30m Dark grey\e[0m      \e[1;40m[1;40m Dark grey\e[0m\n'
 	#printf '\e[1;31m[1;31m Light red\e[0m      \e[1;41m[1;41m Light red\e[0m\n'