RPC: add quotes to examples.

src/rpcmining.cpp

@@ -78,7 +78,7 @@ Value scaninput(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() != 1)
         throw runtime_error(
-            "scaninput {\"txid\":txid, \"vout\":[vout1, vout2, ..., voutN], \"difficulty\":difficulty, \"days\":days}\n"
+            "scaninput '{\"txid\":txid, \"vout\":[vout1, vout2, ..., voutN], \"difficulty\":difficulty, \"days\":days}'\n"
             "Scan specified transaction or input for suitable kernel solutions.\n"
             "    difficulty - upper limit for difficulty, current difficulty by default;\n"
             "    days - time window, 90 days by default.\n"

src/rpcrawtransaction.cpp

@@ -228,7 +228,7 @@ Value createrawtransaction(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() != 2)
         throw runtime_error(
-            "createrawtransaction [{\"txid\":txid,\"vout\":n},...] {address:amount,...}\n"
+            "createrawtransaction '[{\"txid\":txid,\"vout\":n},...]' '{address:amount,...}'\n"
             "Create a transaction spending given inputs\n"
             "(array of objects containing transaction id and output number),\n"
             "sending to given address(es).\n"
@@ -341,7 +341,7 @@ Value signrawtransaction(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() < 1 || params.size() > 4)
         throw runtime_error(
-            "signrawtransaction <hex string> [{\"txid\":txid,\"vout\":n,\"scriptPubKey\":hex,\"redeemScript\":hex},...] [<privatekey1>,...] [sighashtype=\"ALL\"]\n"
+            "signrawtransaction <hex string> '[{\"txid\":txid,\"vout\":n,\"scriptPubKey\":hex,\"redeemScript\":hex},...]' '[<privatekey1>,...]' [sighashtype=\"ALL\"]\n"
             "Sign inputs for raw transaction (serialized, hex-encoded).\n"
             "Second optional argument (may be null) is an array of previous transaction outputs that\n"
             "this transaction depends on but may not yet be in the blockchain.\n"

src/rpcwallet.cpp

@@ -734,7 +734,7 @@ Value sendmany(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() < 2 || params.size() > 4)
         throw runtime_error(
-            "sendmany <fromaccount> {address:amount,...} [minconf=1] [comment]\n"
+            "sendmany <fromaccount> '{address:amount,...}' [minconf=1] [comment]\n"
             "amounts are double-precision floating point numbers"
             + HelpRequiringPassphrase());