I've been putting in the command:
/give @p iron_pickaxe 1 0 {CanDestroy: ["diamond_ore"]}
I've been putting this into a command block. I've repeatedly tried to fix it, change it a little, re-enter it, I even destroyed the command block and tried a new one. Nothing worked. It's been saying the same thing:
Line 1, Column 2
Missing: "}" or object member name
What am I doing wrong here?