General clean up on bookmaker.

Command line runs without error for
SkBitmap, SkPath, SkRect, SkIRect,
SkPixmap, SkCanvas.

Docs-Preview: https://skia.org/?cl=57112
TBR: caryclark@google.com
Bug: skia:6898
Change-Id: I73b69ae8ffdf0a1e6bc187dc8a9dfb28f7766faa
Reviewed-on: https://skia-review.googlesource.com/57112
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
diff --git a/docs/SkPath_Reference.bmh b/docs/SkPath_Reference.bmh
index 8eb0077..e38b30d 100644
--- a/docs/SkPath_Reference.bmh
+++ b/docs/SkPath_Reference.bmh
@@ -1025,7 +1025,7 @@
 #Enum Convexity
 
 #Code
-    enum Convexity {
+    enum Convexity : uint8_t {
         kUnknown_Convexity, 
         kConvex_Convexity,
         kConcave_Convexity,