content/go-fonts: change scaling in code sample

Make it an exact factor of two to reduce fuzziness (maybe).

Change-Id: I9e87dfc0b9b211b1397068a38c409b6aaf9b0747
Reviewed-on: https://go-review.googlesource.com/33360
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/content/go-fonts.article b/content/go-fonts.article
index 1de5211..24cd131 100644
--- a/content/go-fonts.article
+++ b/content/go-fonts.article
@@ -22,7 +22,7 @@
 Go source code looks particularly good when displayed in Go fonts, as its name implies, with things like
 punctuation characters easily distinguishable and operators lined up and placed consistently:
 
-.image go-fonts/go-font-code.png _ 500
+.image go-fonts/go-font-code.png _ 519
 
 Perhaps the most remarkable feature of the Go fonts is their license:
 They are licensed under the same open source license as the rest of the Go project's software,