Backport commit 69107f347 from Emacs

; Fix doc typos related to indefinite articles
69107f347b3ac7f51cd22333f57393fd735915f2
Glenn Morris
Fri Feb 16 17:33:57 2018 -0500

etc/ORG-NEWS

@@ -148,7 +148,7 @@ directories in published site-maps.
 **** Scheme: support for tables
 **** Scheme: new variable: ~org-babel-scheme-null-to~
 
-This new custom option allows to use a empty list or null symbol to
+This new custom option allows you to use an empty list or null symbol to
 format the table output, initially assigned to ~hlines~.
 
 **** Scheme: new header ~:prologue~

lisp/ob-calc.el

@@ -37,7 +37,7 @@
 (declare-function org-trim "org" (s &optional keep-lead))
 
 (defvar org-babel-default-header-args:calc nil
-  "Default arguments for evaluating an calc source block.")
+  "Default arguments for evaluating a calc source block.")
 
 (defun org-babel-expand-body:calc (body _params)
   "Expand BODY according to PARAMS, return the expanded body." body)

lisp/org-clock.el

@@ -1366,7 +1366,7 @@ the default behavior."
 ;;;###autoload
 (defun org-clock-in-last (&optional arg)
   "Clock in the last closed clocked item.
-When already clocking in, send an warning.
+When already clocking in, send a warning.
 With a universal prefix argument, select the task you want to
 clock in from the last clocked in tasks.
 With two universal prefix arguments, start clocking using the

lisp/ox-odt.el

@@ -600,8 +600,7 @@ allow document of a given class (irrespective of its source
 format) to be converted to any of the export formats associated
 with that class.
 
-See default setting of this variable for an typical
-configuration."
+See default setting of this variable for a typical configuration."
   :group 'org-export-odt
   :version "24.1"
   :type
@@ -1938,7 +1937,7 @@ holding contextual information."
 
 (defun org-odt-format-inlinetask-default-function
   (todo todo-type priority name tags contents)
-  "Default format function for a inlinetasks.
+  "Default format function for inlinetasks.
 See `org-odt-format-inlinetask-function' for details."
   (format "\n<text:p text:style-name=\"%s\">%s</text:p>"
 	  "Text_20_body"