Escape double quotes in hang analyzer's waitsfor graph

# Legend:

#    Thread 1 -> Lock 1 indicates Thread 1 is waiting on Lock 1

#    Lock 2 -> Thread 2 indicates Lock 2 is held by Thread 2

# No cycle detected in the graph

digraph "mongod+lock-status" {

    ""conn41" (Thread 0x7f63bf32b700 (LWP 71045))" -> "Lock 0x7f63df74db00 (mongo::MODE_X)";

    "Lock 0x7f63df74db00 (mongo::MODE_X)" -> ""rsSync-0" (Thread 0x7f63bc818700 (LWP 69184))";

    ""repl writer worker 10" (Thread 0x7f63b460b700 (LWP 69197))" -> "Lock 0x7f63df74db00 (mongo::MODE_X)";

    ""clientcursormon" (Thread 0x7f63c2f31700 (LWP 68966))" -> "Lock 0x7f63df74db00 (mongo::MODE_X)";

    ""conn41" (Thread 0x7f63bf32b700 (LWP 71045))" [label="\"conn41\" (Thread 0x7f63bf32b700 (LWP 71045))" ]

    "Lock 0x7f63df74db00 (mongo::MODE_X)" [label="Lock 0x7f63df74db00 (mongo::MODE_X)" ]

    ""rsSync-0" (Thread 0x7f63bc818700 (LWP 69184))" [label="\"rsSync-0\" (Thread 0x7f63bc818700 (LWP 69184))" ]

    ""repl writer worker 10" (Thread 0x7f63b460b700 (LWP 69197))" [label="\"repl writer worker 10\" (Thread 0x7f63b460b700 (LWP 69197))" ]

    ""clientcursormon" (Thread 0x7f63c2f31700 (LWP 68966))" [label="\"clientcursormon\" (Thread 0x7f63c2f31700 (LWP 68966))" ]

}