org-export: Use eq' instead of equal' when possible

* contrib/lisp/org-export.el (org-export-data,
  org-export-footnote-first-reference-p,
  org-export-get-footnote-number, org-export-get-ordinal,
  org-export-get-loc, org-export-table-row-group,
  org-export-table-cell-starts-colgroup-p,
  org-export-table-cell-ends-colgroup-p,
  org-export-table-cell-address): Use `eq' instead of `equal' when
  possible.
* contrib/lisp/org-e-ascii.el (org-e-ascii-table-row):
* contrib/lisp/org-e-beamer.el (org-e-beamer-select-environment):
* contrib/lisp/org-e-html.el (org-e-html-footnote-section,
  org-e-html-latex-environment, org-e-html-paragraph): Use `eq'
  instead of `equal' when possible.
* contrib/lisp/org-e-latex.el (org-e-latex--get-footnote-counter):
* contrib/lisp/org-e-odt.el (org-e-odt-do-format-code,
  org-e-odt-footnote-def, org-e-odt-item, org-e-odt-latex-environment,
  org-e-odt-latex-fragment, org-e-odt-plain-list, org-e-odt-table,
  org-e-odt-enumerate-element): Use `eq' instead of `equal' when
  possible.

In particular, comparing elements shouldn't be done with `equal' since
they are circular lists.  On the other hand, using `eq' is fine if
they belong to the same tree.

contrib/lisp/org-e-ascii.el

@@ -1623,14 +1623,13 @@ a communication channel."
 			 (borders (org-export-table-cell-borders cell info)))
 		     (concat
 		      (when (and (memq 'left borders)
-				 (equal (org-element-map
-					 table-row 'table-cell 'identity info t)
-					cell)))
+				 (eq (org-element-map
+				      table-row 'table-cell 'identity info t)
+				     cell)))
 		      (make-string (+ 2 width) (string-to-char horiz))
 		      (cond
 		       ((not (memq 'right borders)) nil)
-		       ((equal (car (last (org-element-contents table-row)))
-			       cell)
+		       ((eq (car (last (org-element-contents table-row))) cell)
 			rcorner)
 		       (t vert)))))
 		 info)) "\n"))))

contrib/lisp/org-e-beamer.el

@@ -1018,7 +1018,7 @@ aid, but the tag does not have any semantic meaning."
     (org-set-tags)
     (let ((tags (or (ignore-errors (org-get-tags-string)) "")))
       (cond
-       ((equal org-last-tag-selection-key ?|)
+       ((eq org-last-tag-selection-key ?|)
 	(if (string-match ":BMCOL:" tags)
 	    (org-set-property "BEAMER_col" (read-string "Column width: "))
 	  (org-delete-property "BEAMER_col")))

contrib/lisp/org-e-html.el

@@ -1311,7 +1311,7 @@ Replaces invalid characters with \"_\"."
 
 	 (fn-alist
 	  (loop for (n type raw) in fn-alist collect
-		(cons n (if (equal (org-element-type raw) 'org-data)
+		(cons n (if (eq (org-element-type raw) 'org-data)
 			    (org-trim (org-export-data raw info))
 			  (format "<p>%s</p>"
 				  (org-trim (org-export-data raw info))))))))
@@ -2275,9 +2275,9 @@ CONTENTS is nil.  INFO is a plist holding contextual information."
 	 (attr nil)			; FIXME
 	 (label (org-element-property :name latex-environment)))
      (cond
-      ((member processing-type '(t mathjax))
+      ((memq processing-type '(t mathjax))
        (org-e-html-format-latex latex-frag 'mathjax))
-      ((equal processing-type 'dvipng)
+      ((eq processing-type 'dvipng)
        (let* ((formula-link (org-e-html-format-latex
 			     latex-frag processing-type)))
 	 (when (and formula-link
@@ -2579,7 +2579,7 @@ the plist used as a communication channel."
 	 (extra (if class (format " class=\"%s\"" class) ""))
 	 (parent (org-export-get-parent paragraph)))
     (cond
-     ((and (equal (org-element-type parent) 'item)
+     ((and (eq (org-element-type parent) 'item)
 	   (= (org-element-property :begin paragraph)
 	      (org-element-property :contents-begin parent)))
       ;; leading paragraph in a list item have no tags

contrib/lisp/org-e-latex.el

@@ -1262,7 +1262,7 @@ INFO is a plist used as a communication channel."
 		(let ((fn-lbl (org-element-property :label fn)))
 		  (cond
 		   ;; Anonymous footnote match: return number.
-		   ((equal fn footnote-reference) (length seen-refs))
+		   ((eq fn footnote-reference) (length seen-refs))
 		   ;; Anonymous footnote: it's always a new one.
 		   ;; Also, be sure to return nil from the `cond' so
 		   ;; `first-match' doesn't get us out of the loop.

contrib/lisp/org-e-odt.el

@@ -2264,7 +2264,7 @@ This function shouldn't be used for floats.  See
 	   num-start refs))
     (cond
      ((not num-start) code)
-     ((equal num-start 0)
+     ((eq num-start 0)
       (org-e-odt-format-tags
        '("<text:list text:style-name=\"OrgSrcBlockNumberedLine\"%s>"
 	 . "</text:list>") code " text:continue-numbering=\"false\""))
@@ -2480,7 +2480,7 @@ CONTENTS is nil.  INFO is a plist holding contextual information."
 ;;;; Footnote Reference
 
 (defun org-e-odt-footnote-def (raw info) ; FIXME
-  (if (equal (org-element-type raw) 'org-data)
+  (if (eq (org-element-type raw) 'org-data)
       (org-trim (org-export-data raw info)) ; fix paragraph style
     (org-e-odt-format-stylized-paragraph
      'footnote (org-trim (org-export-data raw info)))))
@@ -2692,7 +2692,7 @@ contextual information."
 		       (function
 			(lambda (element info)
 			  (loop for el in (org-element-contents element)
-				thereis (equal (org-element-type el) 'table))))))
+				thereis (eq (org-element-type el) 'table))))))
 		 (cond
 		  ((funcall --element-has-a-table-p item info)
 		   "</text:list-header>")
@@ -2781,7 +2781,7 @@ CONTENTS is nil.  INFO is a plist holding contextual information."
      (cond
       ((member processing-type '(t mathjax))
        (org-e-odt-format-formula latex-environment info))
-      ((equal processing-type 'dvipng)
+      ((eq processing-type 'dvipng)
        (org-e-odt-format-stylized-paragraph
 	nil (org-e-odt-link--inline-image latex-environment info)))
       (t latex-frag)))))
@@ -2804,7 +2804,7 @@ CONTENTS is nil.  INFO is a plist holding contextual information."
     (cond
      ((member processing-type '(t mathjax))
       (org-e-odt-format-formula latex-fragment info))
-     ((equal processing-type 'dvipng)
+     ((eq processing-type 'dvipng)
       (org-e-odt-link--inline-image latex-fragment info))
      (t latex-frag))))
 
@@ -3137,7 +3137,7 @@ contextual information."
 	     ;; continue numbering.
 	     (format "text:continue-numbering=\"%s\""
 		     (let* ((parent (org-export-get-parent plain-list)))
-		       (if (and parent (equal (org-element-type parent) 'item))
+		       (if (and parent (eq (org-element-type parent) 'item))
 			   "true" "false")))
 	     contents))))
 
@@ -3586,13 +3586,13 @@ contextual information."
 	  (function
 	   (lambda (element info)
 	     (loop for el in (funcall --get-previous-elements element info)
-		   thereis (equal (org-element-type el) 'table)))))
+		   thereis (eq (org-element-type el) 'table)))))
 	 (--walk-list-genealogy-and-collect-tags
 	  (function
 	   (lambda (table info)
 	     (let* ((genealogy (org-export-get-genealogy table))
 		    (list-genealogy
-		     (when (equal (org-element-type (car genealogy)) 'item)
+		     (when (eq (org-element-type (car genealogy)) 'item)
 		       (loop for el in genealogy
 			     when (member (org-element-type el)
 					  '(item plain-list))
@@ -4035,7 +4035,7 @@ using `org-open-file'."
 		(lambda (el)
 		  (and (or (not predicate) (funcall predicate el info))
 		       (incf counter)
-		       (equal element el)
+		       (eq element el)
 		       counter))
 		info 'first-match)))))
 	 (scope (funcall numbered-parent-headline-at-<=-n

contrib/lisp/org-element.el

@@ -3532,7 +3532,7 @@ Nil values returned from FUN do not appear in the results."
 	       (cond
 		((not --data))
 		;; Ignored element in an export context.
-		((and info (member --data (plist-get info :ignore-list))))
+		((and info (memq --data (plist-get info :ignore-list))))
 		;; Secondary string: only objects can be found there.
 		((not --type)
 		 (when (eq --category 'objects) (mapc --walk-tree --data)))

contrib/lisp/org-export.el

@@ -1775,7 +1775,7 @@ Return transcoded string."
 			     ;; might be misleading.
 			     (when (eq type 'paragraph)
 			       (let ((parent (org-export-get-parent data)))
-				 (and (equal (car (org-element-contents parent))
+				 (and (eq (car (org-element-contents parent))
 					     data)
 				      (memq (org-element-type parent)
 					    '(footnote-definition item))))))))
@@ -2806,7 +2806,7 @@ INFO is the plist used as a communication channel."
 		  ;; Don't enter footnote definitions since it will
 		  ;; happen when their first reference is found.
 		  info 'first-match 'footnote-definition)))))
-	(equal (catch 'exit (funcall search-refs (plist-get info :parse-tree)))
+	(eq (catch 'exit (funcall search-refs (plist-get info :parse-tree)))
 	       footnote-reference)))))
 
 (defun org-export-get-footnote-definition (footnote-reference info)
@@ -2835,7 +2835,7 @@ INFO is the plist used as a communication channel."
 		(let ((fn-lbl (org-element-property :label fn)))
 		  (cond
 		   ;; Anonymous footnote match: return number.
-		   ((and (not fn-lbl) (equal fn footnote))
+		   ((and (not fn-lbl) (eq fn footnote))
 		    (throw 'exit (1+ (length seen-refs))))
 		   ;; Labels match: return number.
 		   ((and label (string= label fn-lbl))
@@ -3241,7 +3241,7 @@ objects of the same type."
 	  (plist-get info :parse-tree) (or types (org-element-type element))
 	  (lambda (el)
 	    (cond
-	     ((equal element el) (1+ counter))
+	     ((eq element el) (1+ counter))
 	     ((not predicate) (incf counter) nil)
 	     ((funcall predicate el info) (incf counter) nil)))
 	  info 'first-match))))))
@@ -3282,7 +3282,7 @@ ELEMENT is excluded from count."
      (lambda (el)
        (cond
         ;; ELEMENT is reached: Quit the loop.
-        ((equal el element) t)
+        ((eq el element))
         ;; Only count lines from src-block and example-block elements
         ;; with a "+n" or "-n" switch.  A "-n" switch resets counter.
         ((not (memq (org-element-type el) '(src-block example-block))) nil)
@@ -3547,7 +3547,7 @@ rows and table rules.  Group 1 is also table's header."
 	     (unless row-flag (incf group) (setq row-flag t)))
 	    ((eq (org-element-property :type row) 'rule)
 	     (setq row-flag nil)))
-	   (when (equal table-row row) (throw 'found group)))
+	   (when (eq table-row row) (throw 'found group)))
 	 (org-element-contents (org-export-get-parent table-row)))))))
 
 (defun org-export-table-cell-width (table-cell info)
@@ -3737,7 +3737,7 @@ INFO is a plist used as a communication channel."
   ;; A cell starts a column group either when it is at the beginning
   ;; of a row (or after the special column, if any) or when it has
   ;; a left border.
-  (or (equal (org-element-map
+  (or (eq (org-element-map
 	      (org-export-get-parent table-cell)
 	      'table-cell 'identity info 'first-match)
 	     table-cell)
@@ -3748,7 +3748,7 @@ INFO is a plist used as a communication channel."
 INFO is a plist used as a communication channel."
   ;; A cell ends a column group either when it is at the end of a row
   ;; or when it has a right border.
-  (or (equal (car (last (org-element-contents
+  (or (eq (car (last (org-element-contents
 			 (org-export-get-parent table-cell))))
 	     table-cell)
       (memq 'right (org-export-table-cell-borders table-cell info))))
@@ -3822,7 +3822,7 @@ function returns nil for other cells."
     ;; Ignore cells in special rows or in special column.
     (unless (or (org-export-table-row-is-special-p table-row info)
 		(and (org-export-table-has-special-column-p table)
-		     (equal (car (org-element-contents table-row)) table-cell)))
+		     (eq (car (org-element-contents table-row)) table-cell)))
       (cons
        ;; Row number.
        (let ((row-count 0))
@@ -3830,7 +3830,7 @@ function returns nil for other cells."
 	  table 'table-row
 	  (lambda (row)
 	    (cond ((eq (org-element-property :type row) 'rule) nil)
-		  ((equal row table-row) row-count)
+		  ((eq row table-row) row-count)
 		  (t (incf row-count) nil)))
 	  info 'first-match))
        ;; Column number.
@@ -3838,8 +3838,7 @@ function returns nil for other cells."
 	 (org-element-map
 	  table-row 'table-cell
 	  (lambda (cell)
-	    (if (equal cell table-cell) col-count
-	      (incf col-count) nil))
+	    (if (eq cell table-cell) col-count (incf col-count) nil))
 	  info 'first-match))))))
 
 (defun org-export-get-table-cell-at (address table info)