fixed typos and made verifications

Author: haoxian2

DirectProgramming/C++SYCL_FPGA/Tutorials/DesignPatterns/zero_copy_data_transfer/README.md

@@ -176,7 +176,6 @@ Locate `report.html` in the `zero_copy_data_transfer_report.prj/reports/` direct
         ```
         set CL_CONTEXT_MPSIM_DEVICE_INTELFPGA=1
         zero_copy_data_transfer.fpga_sim.exe
-        set CL_CONTEXT_MPSIM_DEVICE_INTELFPGA=
         ```
 3. Run the sample on the FPGA device:
     ```

DirectProgramming/C++SYCL_FPGA/Tutorials/Features/printf/README.md

@@ -195,8 +195,8 @@ From the report, you can find the compilation information of the design and the
      ```
 2. Run the sample on the FPGA simulator:
      ```
-     ./printf.fpga_sim     (Linux)
-     printf.fpga_sim.exe   (Windows)
+     CL_CONTEXT_MPSIM_DEVICE_INTELFPGA=1 ./printf.fpga_sim     (Linux)
+     CL_CONTEXT_MPSIM_DEVICE_INTELFPGA=1 printf.fpga_sim.exe   (Windows)
      ```
 3. Run the sample on the FPGA device:
      ```