Update include generator to use space instead of tabs

com.unity.render-pipelines.core/CoreRP/Editor/ShaderGenerator/ShaderTypeGeneration.cs

                     }
                 }
 
-                shaderText += "\treturn value." + acc.name + swizzle + ";\n";
+                shaderText +=
+                            //"\t"
+                            "    " // unity convention use space instead of tab...
+                            + "return value." + acc.name + swizzle + ";\n";
                 shaderText += "}\n";
             }
 

com.unity.shadergraph/Editor/Data/Util/PropertyCollector.cs

             foreach (var prop in m_Properties.Where(x => x.generatePropertyBlock))
             {
                 for (var i = 0; i < baseIndentLevel; i++)
-                    sb.Append("\t");
+                {
+                    //sb.Append("\t");
+                    sb.Append("    "); // unity convention use space instead of tab...
+                }
                 sb.AppendLine(prop.GetPropertyBlockString());
             }
             return sb.ToString();

com.unity.shadergraph/Editor/Data/Util/ShaderGenerator.cs

                 {
                     var line = lines[index];
                     for (var i = 0; i < shaderChunk.chunkIndentLevel + baseIndentLevel; i++)
-                        sb.Append("\t");
+                    {
+                        //sb.Append("\t");
+                        sb.Append("    "); // unity convention use space instead of tab...
+                    }
 
                     sb.AppendLine(line);
                     appendedNewline = true;