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[Emacs-diffs] emacs-25 43cb9f8: Omit unnecessary history from Lisp intro
From: |
Paul Eggert |
Subject: |
[Emacs-diffs] emacs-25 43cb9f8: Omit unnecessary history from Lisp intro |
Date: |
Mon, 01 Feb 2016 01:31:58 +0000 |
branch: emacs-25
commit 43cb9f8ff378100ec31cb576faf347a87a05ba5d
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>
Omit unnecessary history from Lisp intro
* doc/lispintro/emacs-lisp-intro.texi (Review, Digression into C)
(Conclusion): Reword so as not to talk about earlier versions
of Emacs in what should be an intro.
---
doc/lispintro/emacs-lisp-intro.texi | 44 ++++++++---------------------------
1 files changed, 10 insertions(+), 34 deletions(-)
diff --git a/doc/lispintro/emacs-lisp-intro.texi
b/doc/lispintro/emacs-lisp-intro.texi
index 6c4f305..78c1865 100644
--- a/doc/lispintro/emacs-lisp-intro.texi
+++ b/doc/lispintro/emacs-lisp-intro.texi
@@ -4309,38 +4309,18 @@ documentation, an optional interactive declaration, and
the body of
the definition.
@need 1250
-For example, in an early version of Emacs, the function definition was
-as follows. (It is slightly more complex now that it seeks the first
-non-whitespace character rather than the first visible character.)
+For example, in Emacs the function definition of
address@hidden is as follows.
@smallexample
@group
-(defun back-to-indentation ()
- "Move point to first visible character on line."
+(defun dired-unmark-all-marks ()
+ "Remove all marks from all files in the Dired buffer."
(interactive)
- (beginning-of-line 1)
- (skip-chars-forward " \t"))
+ (dired-unmark-all-files ?\r))
@end group
@end smallexample
address@hidden
-In GNU Emacs 22,
-
-(defun backward-to-indentation (&optional arg)
- "Move backward ARG lines and position at first nonblank character."
- (interactive "p")
- (forward-line (- (or arg 1)))
- (skip-chars-forward " \t"))
-
-(defun back-to-indentation ()
- "Move point to the first non-whitespace character on this line."
- (interactive)
- (beginning-of-line 1)
- (skip-syntax-forward " " (line-end-position))
- ;; Move back over chars that have whitespace syntax but have the p flag.
- (backward-prefix-chars))
address@hidden ignore
-
@item interactive
Declare to the interpreter that the function can be used
interactively. This special form may be followed by a string with one
@@ -9123,13 +9103,12 @@ address@hidden precisely, and requiring more expert
knowledge
to understand, the two integers are of type @code{Lisp_Object}, which can
also be a C union instead of an integer type.}.
-In early versions of Emacs, these two numbers were thirty-two bits
-long, but the code is slowly being generalized to handle other
-lengths. Three of the available bits are used to specify the type of
-information; the remaining bits are used as content.
+Integer widths depend on the machine, and are typically 32 or 64 bits.
+A few of the bits are used to specify the type of information; the
+remaining bits are used as content.
@samp{XINT} is a C macro that extracts the relevant number from the
-longer collection of bits; the three other bits are discarded.
+longer collection of bits; the type bits are discarded.
@need 800
The command in @code{delete-and-extract-region} looks like this:
@@ -18724,10 +18703,7 @@ Even though it is short, @code{split-line} contains
expressions
we have not studied: @code{skip-chars-forward}, @code{indent-to},
@code{current-column} and @code{insert-and-inherit}.
-Consider the @code{skip-chars-forward} function. (It is part of the
-function definition for @code{back-to-indentation}, which is shown in
address@hidden, , Review}.)
-
+Consider the @code{skip-chars-forward} function.
In GNU Emacs, you can find out more about @code{skip-chars-forward} by
typing @kbd{C-h f} (@code{describe-function}) and the name of the
function. This gives you the function documentation.
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