perf: increase default left margin size for band chart

Change-Id: Id370d80a0cd0f864277e51bc810ddd6d4d5b3209
Reviewed-on: https://go-review.googlesource.com/c/build/+/412382
Reviewed-by: Michael Pratt <mpratt@google.com>
diff --git a/third_party/bandchart/bandchart.js b/third_party/bandchart/bandchart.js
index b865e1c..bb293c5 100644
--- a/third_party/bandchart/bandchart.js
+++ b/third_party/bandchart/bandchart.js
@@ -7,7 +7,7 @@
 	marginTop = 50, // top margin, in pixels
 	marginRight = 15, // right margin, in pixels
 	marginBottom = 50, // bottom margin, in pixels
-	marginLeft = 30, // left margin, in pixels
+	marginLeft = 50, // left margin, in pixels
 	width = 480, // outer width, in pixels
 	height = 240, // outer height, in pixels
 	unit,