Fix indentation of invocation examples

Author: lupino3

README.md

@@ -49,26 +49,26 @@ Invocation example for Ubuntu Linux and WSL (Windows Subsystem for Linux), assum
 Python and `pip` are installed:
 
 ```bash
-    $ pip install cmd-call-graph
-    $ cmd-call-graph < your-file.cmd > your-file-call-graph.dot 2>log
+$ pip install cmd-call-graph
+$ cmd-call-graph < your-file.cmd > your-file-call-graph.dot 2>log
 ```
 
 The resulting `dot` file can be rendered with any `dot` renderer. Example with
 graphviz (`VIEWER` could be `explorer.exe` under Windows:
 
 ```bash
-    $ sudo apt install graphviz
-    $ dot -Tpng your-file-call-graph.dot > your-file-call-graph.png
-    $ $VIEWER your-file-call-graph.png
+$ sudo apt install graphviz
+$ dot -Tpng your-file-call-graph.dot > your-file-call-graph.png
+$ $VIEWER your-file-call-graph.png
 ```
 
 Example with PowerShell:
 
 ```powershell
-    PS C:\> choco install graphviz python3 pip
-    PS C:\> cmd-call-graph.exe -i your-file.cmd -o your-file-call-graph.dot
-    PS C:\> dot.exe -Tpng your-file-call-graph.dot -O
-    PS C:\> explorer.exe your-file-call-graph.dot.png
+PS C:\> choco install graphviz python3 pip
+PS C:\> cmd-call-graph.exe -i your-file.cmd -o your-file-call-graph.dot
+PS C:\> dot.exe -Tpng your-file-call-graph.dot -O
+PS C:\> explorer.exe your-file-call-graph.dot.png
 ```
 
 ## Types of entities represented