org-faces.el (org-block): Enhance docstring

* lisp/org-faces.el (org-block): Enhance docstring.
* lisp/org.el (org-fontify-meta-lines-and-blocks-1): Clean up some
comments.

See 7769518f3, which was wrong.

lisp/org-faces.el

@@ -410,8 +410,15 @@ follows a #+DATE:, #+AUTHOR: or #+EMAIL: keyword."
 
 (defface org-block `((t :inherit shadow
 			,@(and (>= emacs-major-version 27) '(:extend t))))
-  "Face text in #+begin ... #+end blocks.
-For source-blocks `org-src-block-faces' takes precedence."
+  "Face used for text inside various blocks.
+
+It is always used for source blocks.  You can refine what face
+should be used depending on the source block language by setting,
+`org-src-block-faces', which takes precedence.
+
+When `org-fontify-quote-and-verse-blocks' is not nil, text inside
+verse and quote blocks are fontified using the `org-verse' and
+`org-quote' faces, which inherit from `org-block'."
   :group 'org-faces
   :version "26.1")
 

lisp/org.el

@@ -5231,9 +5231,11 @@ by a #."
 	   limit t)
       (let ((beg (match-beginning 0))
 	    (end-of-beginline (match-end 0))
-	    (block-start (match-end 0))  ; includes the \n at end of #+begin line
-	    (block-end nil)              ; will include \n after end of block content
-	    (lang (match-string 7))      ; the language, if it is an src block
+	    ;; Including \n at end of #+begin line will include \n
+	    ;; after the end of block content.
+	    (block-start (match-end 0))
+	    (block-end nil)
+	    (lang (match-string 7)) ; The language, if it is a source block.
 	    (bol-after-beginline (line-beginning-position 2))
 	    (dc1 (downcase (match-string 2)))
 	    (dc3 (downcase (match-string 3)))
@@ -5243,7 +5245,8 @@ by a #."
 	 ((and (match-end 4) (equal dc3 "+begin"))
 	  ;; Truly a block
 	  (setq block-type (downcase (match-string 5))
-		quoting (member block-type org-protecting-blocks)) ; src, example, export, maybe more
+		;; Src, example, export, maybe more.
+		quoting (member block-type org-protecting-blocks))
 	  (when (re-search-forward
 		 (rx-to-string `(group bol (or (seq (one-or-more "*") space)
 					       (seq (zero-or-more blank)
@@ -5251,12 +5254,13 @@ by a #."
 						    ,(match-string 4)
 						    word-end
 						    (zero-or-more any)))))
-		 nil t)  ;; on purpose, we look further than LIMIT
-	    ;; We do have a matching #+end line
+		 ;; We look further than LIMIT on purpose.
+		 nil t)
+	    ;; We do have a matching #+end line.
 	    (setq beg-of-endline (match-beginning 0)
 		  end-of-endline (match-end 0)
 		  nl-before-endline (1- (match-beginning 0)))
-	    (setq block-end (match-beginning 0)) ; includes the final newline.
+	    (setq block-end (match-beginning 0)) ; Include the final newline.
 	    (when quoting
 	      (org-remove-flyspell-overlays-in bol-after-beginline nl-before-endline)
 	      (remove-text-properties beg end-of-endline