fixed syntax error for octsim import

sys2-jupyter-notebooks/exam_examples/DCMachine_Teil1.ipynb

@@ -54,7 +54,7 @@
    "outputs": [],
    "source": [
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n",
+    "addpath('../Octsim');\n",
     "\n",
     "% With mechanical losses\n",
     "A = [-R/L -K/L; K/J -Km/J]\n",

sys2-jupyter-notebooks/exam_examples/DCMachine_Teil2.ipynb

@@ -92,7 +92,7 @@
    ],
    "source": [
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n",
+    "addpath('../Octsim');\n",
     "\n",
     "A = [-R/L -K/L; K/J -Km/J]\n",
     "B = [1/L; 0]\n",

sys2-jupyter-notebooks/exam_examples/V1.ipynb

@@ -31,7 +31,7 @@
     "clear all\n",
     "\n",
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n"
+    "addpath('../Octsim');\n"
    ]
   },
   {

sys2-jupyter-notebooks/exam_examples/V4_2.ipynb

@@ -58,7 +58,7 @@
 	"pkg load control\n",
 	"\n",
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n",
+    "addpath('../Octsim');\n",
     "\n",
     "\n",
     "tau1 = 1\n",

sys2-jupyter-notebooks/exam_examples/V8.ipynb

@@ -20,7 +20,7 @@
     "clear all\n",
     "\n",
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n"
+    "addpath('../Octsim');\n"
    ]
   },
   {

sys2-jupyter-notebooks/exam_examples/V9.ipynb

@@ -517,7 +517,7 @@
    ],
    "source": [
     "% Set the Octsim Engine to run the simulation\n",
-    "addpath("../Octsim");\n",
+    "addpath('../Octsim');\n",
     "\n",
     "% Simulation Parameters\n",
     "% Start time\n",