; Fix documentation of recent commits related to treesit

* src/treesit.c (Ftreesit_parser_changed_ranges):
* doc/lispref/parsing.texi (Using Parser): Fix wording.

doc/lispref/parsing.texi

@@ -539,10 +539,10 @@ symbol, rather than a lambda function.
 This function returns the list of @var{parser}'s notifier functions.
 @end defun
 
-Sometimes a user might want to synchronously get the changed ranges of
-the last reparse, and @code{treesit-parser-changed-ranges} is just for
-it.  This function basically returns the @var{ranges} that the notifier
-functions were passed.
+Sometimes a Lisp program might need to synchronously get the changed
+ranges of the last reparse.  The function
+@code{treesit-parser-changed-ranges} exists for this purpose.  It
+returns the ranges which were passed to the notifier functions.
 
 @defun treesit-parser-changed-ranges parser &optional quiet
 This function returns the ranges that has been changed since last
@@ -552,8 +552,8 @@ mark the start and the end positions of a range.
 
 This function should almost always be called immediately after
 reparsing.  If it's called when there are new buffer edits that hasn't
-been reparsed, Emacs signals @code{treesit-unparsed-edits}, unless
-@var{quiet} is non-nil.
+been reparsed, Emacs signals the @code{treesit-unparsed-edits} error,
+unless the optional argument @var{quiet} is non-nil.
 
 Calling this function multiple times consecutively doesn't change its
 return value; it always returns the ranges affected by the last reparse.

src/treesit.c

@@ -1833,13 +1833,13 @@ DEFUN ("treesit-parser-changed-ranges", Ftreesit_parser_changed_ranges,
        1, 2, 0,
        doc: /* Return the buffer regions affected by the last reparse of PARSER.
 
-Returns a list of cons (BEG . END), where each cons represents a region
-in which the buffer content was affected by the last reparse.
+Returns a list of cons cells (BEG . END), where each cons cell represents
+a region in which changes in buffer contents affected the last reparse.
 
 This function should almost always be called immediately after
 reparsing.  If it's called when there are new buffer edits that hasn't
-been reparsed, Emacs signals `treesit-unparsed-edits', unless QUIET is
-non-nil.
+been reparsed, Emacs signals the `treesit-unparsed-edits' error, unless
+optional argument QUIET is non-nil.
 
 Calling this function multiple times consecutively doesn't change its
 return value; it always returns the ranges affected by the last