Backport commit f88a7897a from Emacs

* lisp/ob-R.el (org-babel-R-write-object-command):
* lisp/org-attach.el (org-attach-after-change-hook):
* lisp/org.el (org-stamp-time-of-day-regexp): Shorten doc strings to
not exceed 80-column limits.  (Bug#44858)

Shorten over-wide docstrings in variables
f88a7897a80ee9129bdc444cafff32d026c4b6d8
Stefan Kangas
Sat Dec 19 18:21:06 2020 +0100

lisp/ob-R.el

@@ -361,7 +361,7 @@ Each member of this list is a list with three members:
             )
     }
 }(object=%s,transfer.file=\"%s\")"
-  "A template for an R command to evaluate a block of code and write the result to a file.
+  "Template for an R command to evaluate a block of code and write result to file.
 
 Has four %s escapes to be filled in:
 1. Row names, \"TRUE\" or \"FALSE\"

lisp/org-attach.el

@@ -182,7 +182,7 @@ attachment folders based on ID."
   :type '(repeat (function :tag "Function with ID as input")))
 
 (defvar org-attach-after-change-hook nil
-  "Hook to be called when files have been added or removed to the attachment folder.")
+  "Hook called when files have been added or removed to the attachment folder.")
 
 (defvar org-attach-open-hook nil
   "Hook that is invoked by `org-attach-open'.

lisp/org.el

@@ -4112,7 +4112,8 @@ groups carry important information:
   "Regular expression to match a timestamp time or time range.
 After a match, the following groups carry important information:
 0  the full match
-1  date plus weekday, for back referencing to make sure both times are on the same day
+1  date plus weekday, for back referencing to make sure
+     both times are on the same day
 2  the first time, range or not
 4  the second time, if it is a range.")