procyberian/emacs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Document \807 etc. in raw byte display

Browse source 
* doc/emacs/display.texi (Display Custom): Mention potential
confusion in raw byte display.
This commit is contained in:
Paul Eggert 2022-04-28 10:51:01 -07:00
parent 75366be2c0
commit a41a181db5
1 changed files with 11 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
doc/emacs/display.texi
View file

@ -2097,3 +2097,14 @@ argument to suppress the effect of bold-face in this case.
byte with a decimal value of 128 is displayed as @code{\200}. To
change display to the hexadecimal format of @code{\x80}, set the
variable @code{display-raw-bytes-as-hex} to @code{t}.
Care may be needed when interpreting a raw byte when copying
text from a terminal containing an Emacs session, or when a terminal's
@code{escape-glyph} face looks like the default face. For example, by
default Emacs displays the four characters @samp{\}, @samp{2},
@samp{0}, @samp{0} with the same characters it displays a byte with
decimal value 128. The problem can be worse with hex displays, where
the raw byte 128 followed by the character @samp{7} is displayed as
@code{\x807}, which Emacs Lisp reads as the single character U+0807
SAMARITAN LETTER IT; this confusion does not occur with the
corresponding octal display @code{\2007} because octal escapes contain
at most three digits.