Fix markdown in source_maps README.md so it renders correctly in pub site.

R=nweiz@google.com

Review URL: https://codereview.chromium.org//357013002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/source_maps@37796 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed
tree: 2cac20b71a03275278305d0452bc866d5ec4f2c7
  1. pkgs/