fix bookmaker

Mark experimental method in SkCanvas as "Experimental" in its
comment. Maybe it should be enough to name the routine experimental_...
but for now bookmaker requires the comment to say that as well.

Change the TextIntercept examples to #NoExample.

TBR=reed@google.com,bsalomon@google.com

Docs-Preview: https://skia.org/?cl=172402
Bug: skia:
Change-Id: Id74b59e141d5002a8b6118ca28cb9c62a36e2f02
Reviewed-on: https://skia-review.googlesource.com/c/172402
Reviewed-by: Cary Clark <caryclark@skia.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Cary Clark <caryclark@skia.org>
diff --git a/docs/SkPaint_Reference.bmh b/docs/SkPaint_Reference.bmh
index 98067ae..9ae82cd 100644
--- a/docs/SkPaint_Reference.bmh
+++ b/docs/SkPaint_Reference.bmh
@@ -3504,7 +3504,7 @@
 #Line # returns where lines intersect text; underlines ##
 #Populate
 
-#Example
+#NoExample
 #Height 128
 #Description
 Underline uses intercepts to draw on either side of the glyph Descender.
@@ -3539,7 +3539,7 @@
 #Line # returns where lines intersect positioned text; underlines ##
 #Populate
 
-#Example
+#NoExample
     #Description
     Text intercepts draw on either side of, but not inside, Glyphs in a run.
     ##
@@ -3576,7 +3576,7 @@
 #Line # returns where lines intersect horizontally positioned text; underlines ##
 #Populate
 
-#Example
+#NoExample
     #Height 128
     #Description
     Text intercepts do not take stroke thickness into consideration.