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| author | Glenn Morris <rgm@gnu.org> | 2020-07-11 09:25:04 -0700 |
|---|---|---|
| committer | Glenn Morris <rgm@gnu.org> | 2020-07-11 09:25:04 -0700 |
| commit | 398a2680616112675afe26478706a3cea9e76158 (patch) | |
| tree | 24751dcc7238b3b65612f670569f10484f1d9fcd /doc/lispref | |
| parent | 6cc35829e4772479abed1f46f0c51daa24d070e0 (diff) | |
| parent | c04b92104c2bc4c1a719e06fbe11045a204c36a0 (diff) | |
| download | emacs-398a2680616112675afe26478706a3cea9e76158.tar.gz | |
Merge from origin/emacs-27
c04b92104c Add commentary in gtkutil.c
6290850dac Consistently stylize eldoc as ElDoc in prose
136e931189 Improve documentation of "C-u C-x ="
1f52771fd3 Mention floating rounding issues
c892ae65b4 Repair global-auto-revert-ignore-modes (bug#42271)
3a446a02fb ; * src/xdisp.c (decode_mode_spec): Fix commentary.
79f381b4a6 One more improvement of left/right-fringe display spec docs
1279bdb072 Another clarification of left/right-fringe display spec
# Conflicts:
# doc/emacs/programs.texi
Diffstat (limited to 'doc/lispref')
| -rw-r--r-- | doc/lispref/display.texi | 12 | ||||
| -rw-r--r-- | doc/lispref/numbers.texi | 3 |
2 files changed, 12 insertions, 3 deletions
diff --git a/doc/lispref/display.texi b/doc/lispref/display.texi index d7aab4ae62f..25eabd6c3fc 100644 --- a/doc/lispref/display.texi +++ b/doc/lispref/display.texi @@ -4275,9 +4275,15 @@ a display specification has the form @var{fringe} is either the symbol @code{left-fringe} or @code{right-fringe}. @var{bitmap} is a symbol identifying the bitmap to display. The optional @var{face} names a face whose foreground and -background colors are to be used to display the bitmap; this face is -automatically merged with the @code{fringe} face. If @var{face} is -omitted, that means to use the @code{default} face. +background colors are to be used to display the bitmap, using the +attributes of the @code{fringe} face for colors that @var{face} didn't +specify. If @var{face} is omitted, that means to use the attributes +of the @code{default} face for the colors which the @code{fringe} face +didn't specify. For predictable results that don't depend on the +attributes of the @code{default} and @code{fringe} faces, we recommend +you never omit @var{face}, but always provide a specific face. In +particular, if you want the bitmap to be always displayed in the +@code{fringe} face, use @code{fringe} as @var{face}. For instance, to display an arrow in the left fringe, using the @code{warning} face, you could say something like: diff --git a/doc/lispref/numbers.texi b/doc/lispref/numbers.texi index 4002b36ce50..f018ef4c7c0 100644 --- a/doc/lispref/numbers.texi +++ b/doc/lispref/numbers.texi @@ -227,6 +227,9 @@ you are using. On all computers supported by Emacs, this is and is discussed further in David Goldberg's paper ``@url{https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html, What Every Computer Scientist Should Know About Floating-Point Arithmetic}''. +On modern platforms, floating-point operations follow the IEEE-754 +standard closely; however, results are not always rounded correctly on +some obsolescent platforms, notably 32-bit x86. The read syntax for floating-point numbers requires either a decimal point, an exponent, or both. Optional signs (@samp{+} or @samp{-}) |