Milo: Fix empty lines in step text

milo/appengine/logdog/internal/stream.pb.go

 // Code generated by protoc-gen-go.
 // source: github.com/luci/luci-go/milo/appengine/logdog/internal/stream.proto
 // DO NOT EDIT!
 
 /*
 Package internal is a generated protocol buffer package.
 
 It is generated from these files:
         github.com/luci/luci-go/milo/appengine/logdog/internal/stream.proto
 
@@ skipping 49 matching lines @@
 func init() {
         proto.RegisterType((*CachedStep)(nil), "internal.CachedStep")
 }
 
 func init() {
         proto.RegisterFile("github.com/luci/luci-go/milo/appengine/logdog/internal/stream.proto", fileDescriptor0)
 }
 
 var fileDescriptor0 = []byte{
         // 179 bytes of a gzipped FileDescriptorProto
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+        0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0xcc, 0xbf, 0x6a, 0xc4, 0x30,
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         0x00, 0x00, 0x00,
 }