ob-table: Updated documentation.

* ob-table.el (org-sbe): Updated documentation.

lisp/ob-table.el

@@ -47,7 +47,10 @@
 ;; |        7 |        |
 ;; |        8 |        |
 ;; |        9 |        |
-;; #+TBLFM: $2='(org-sbe 'fibbd (n $1))
+;; #+TBLFM: $2='(org-sbe "fibbd" (n $1))
+
+;; NOTE: The quotation marks around the function name, 'fibbd' here,
+;; are optional.
 
 ;;; Code:
 (require 'ob-core)
@@ -69,7 +72,7 @@ string of its value.
 
 So this `org-sbe' construct
 
- (org-sbe 'source-block (n $2) (m 3))
+ (org-sbe \"source-block\" (n $2) (m 3))
 
 is the equivalent of the following source code block:
 
@@ -77,6 +80,9 @@ is the equivalent of the following source code block:
  results
  #+end_src
 
+NOTE: The quotation marks around the function name,
+'source-block', are optional.
+
 NOTE: By default, string variable names are interpreted as
 references to source-code blocks, to force interpretation of a
 cell's value as a string, prefix the identifier a \"$\" (e.g.,