Fix RegEx example in class doc and correct typo

Fix minor errors to do with `search_all` example in RegEx and
typo in RegExMatch class docs.

modules/regex/doc_classes/RegEx.xml

@@ -32,8 +32,7 @@
 		[codeblock]
 		for result in regex.search_all("d01, d03, d0c, x3f and x42"):
 		    print(result.get_string("digit"))
-		# Would print 01 03 3f 42
-		# Note that d0c would not match
+		# Would print 01 03 0 3f 42
 		[/codeblock]
 		[b]Note:[/b] Godot's regex implementation is based on the [url=https://www.pcre.org/]PCRE2[/url] library. You can view the full pattern reference [url=https://www.pcre.org/current/doc/html/pcre2pattern.html]here[/url].
 		[b]Tip:[/b] You can use [url=https://regexr.com/]Regexr[/url] to test regular expressions online.