diff --git a/.gitignore b/.gitignore
index 71fd5c6..bc64d06 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,4 @@ build
dist
*.egg-info
*.in
+Docker
diff --git a/tutorials/Graph World/advance.ipynb b/tutorials/Graph World/advance.ipynb
index 299d914..cd8a81e 100644
--- a/tutorials/Graph World/advance.ipynb
+++ b/tutorials/Graph World/advance.ipynb
@@ -67,7 +67,7 @@
"# Graph World\n",
"Let's start with creating a Graph world using the image below. But this time we will not use the default settings and will customize our world.\n",
"\n",
- "\n",
+ "\n",
"\n",
"## World Information\n",
"Before creating the Graph World we have to first create the world blueprint/template. We call this blueprint/template as *world information*. This is like a abstract view of your world.\n",
diff --git a/tutorials/Graph World/beginner.ipynb b/tutorials/Graph World/beginner.ipynb
index ba0cf00..30b5c4d 100644
--- a/tutorials/Graph World/beginner.ipynb
+++ b/tutorials/Graph World/beginner.ipynb
@@ -69,7 +69,7 @@
"\n",
"We will create a simple Graph as shown below with the default settings on.\n",
"\n",
- "\n",
+ "\n",
"\n",
"## World Information\n",
"Before creating the Graph World we have to first create the world blueprint/template. We call this blueprint/template as *world information*. This is like a abstract view of your world.\n",
diff --git a/tutorials/Tree World/advance.ipynb b/tutorials/Tree World/advance.ipynb
index 9ae2765..965c9ef 100644
--- a/tutorials/Tree World/advance.ipynb
+++ b/tutorials/Tree World/advance.ipynb
@@ -133,7 +133,7 @@
"# Create a Tree World\n",
"Let's start with creating a Tree world using the image below. But this time we will not use the default settings and will customize our world.\n",
"\n",
- "\n",
+ "\n",
"\n",
"We will make the following changes:\n",
"- `radius`: Controls the size of each node of the tree.\n",