org-id: Fix checkdoc warnings

* org-id: Fix checkdoc warnings.

lisp/org-id.el

@@ -419,15 +419,15 @@ So a typical ID could look like \"Org:4nd91V40HI\"."
 	    (substring rnd 18 20)
 	    (substring rnd 20 32))))
 
-(defun org-id-int-to-b36-one-digit (i)
-  "Turn an integer between 0 and 61 into a single character 0..9, A..Z, a..z."
+(defun org-id-int-to-b36-one-digit (integer)
+  "Convert INTEGER between 0 and 61 into a single character 0..9, A..Z, a..z."
   (cond
-   ((< i 10) (+ ?0 i))
-   ((< i 36) (+ ?a i -10))
+   ((< integer 10) (+ ?0 integer))
+   ((< integer 36) (+ ?a integer -10))
    (t (error "Larger that 35"))))
 
 (defun org-id-b36-to-int-one-digit (i)
-  "Turn a character 0..9, A..Z, a..z into a number 0..61.
+  "Convert character 0..9, A..Z, a..z into a number 0..61.
 The input I may be a character, or a single-letter string."
   (and (stringp i) (setq i (string-to-char i)))
   (cond
@@ -435,9 +435,11 @@ The input I may be a character, or a single-letter string."
    ((and (>= i ?a) (<= i ?z)) (+ (- i ?a) 10))
    (t (error "Invalid b36 letter"))))
 
-(defun org-id-int-to-b36 (i &optional length)
-  "Convert an integer to a base-36 number represented as a string."
-  (let ((s ""))
+(defun org-id-int-to-b36 (integer &optional length)
+  "Convert an INTEGER to a base-36 number represented as a string.
+The returned string is padded with leading zeros to LENGTH if necessary."
+  (let ((s "")
+        (i integer))
     (while (> i 0)
       (setq s (concat (char-to-string
 		       (org-id-int-to-b36-one-digit (mod i 36))) s)
@@ -447,11 +449,11 @@ The input I may be a character, or a single-letter string."
 	(setq s (concat (make-string (- length (length s)) ?0) s)))
     s))
 
-(defun org-id-b36-to-int (s)
-  "Convert a base-36 string into the corresponding integer."
+(defun org-id-b36-to-int (string)
+  "Convert a base-36 STRING into the corresponding integer."
   (let ((r 0))
     (mapc (lambda (i) (setq r (+ (* r 36) (org-id-b36-to-int-one-digit i))))
-	  s)
+	  string)
     r))
 
 (defun org-id-time-to-b36 (&optional time)
@@ -489,7 +491,8 @@ and TIME is a Lisp time value (HI LO USEC)."
 Store the relation between files and corresponding IDs.
 This will scan all agenda files, all associated archives, and all
 files currently mentioned in `org-id-locations'.
-When FILES is given, scan also these files."
+When FILES is given, scan also these files.
+If SILENT is non-nil, messages are suppressed."
   (interactive)
   (unless org-id-track-globally
     (error "Please turn on `org-id-track-globally' if you want to track IDs"))
@@ -610,7 +613,7 @@ When FILES is given, scan also these files."
   (add-hook 'kill-emacs-hook 'org-id-locations-save))
 
 (defun org-id-hash-to-alist (hash)
-  "Turn an org-id hash into an alist.
+  "Turn an org-id HASH into an alist.
 This is to be able to write it to a file."
   (let (res x)
     (maphash
@@ -622,7 +625,7 @@ This is to be able to write it to a file."
     res))
 
 (defun org-id-alist-to-hash (list)
-  "Turn an org-id location list into a hash table."
+  "Turn an org-id location LIST into a hash table."
   (let ((res (make-hash-table
 	      :test 'equal
 	      :size (apply '+ (mapcar 'length list))))