Upstream update: These are the differences between version 418 and version 429: * LESSOPEN pipe will now be used on standard input, if the LESSOPEN environment variable begins with "|-". * The -D option with one number now means use the normal background color. * Don't change permissions on history file if it is not a regular file. * Fix non-ANSI-compliant code that caused problems with some compilers. * Fix binary file detection in UTF-8 mode. * Fix display problems with long lines on "ignaw" terminals. * Fix problem interrupting the line number calculation for initial prompt. * Fix SGR emulation when dealing with multiple attributes (eg. bold+underline). * Fix highlight bug when searching for underlined/overstruck text. * New "&" command allows filtering of lines based on a pattern. * Status column now displays a search match, even if the matched string is scrolled off screen because -S is in effect. * Improve behavior of -F option. * Allow CSI character (0x9B) to work in UTF-8 mode. * Output carriage return at startup in case terminal doesn't default to column 1. * Fix bug in '' (quote, quote) command after G command.