Merge pull request #4517 from daikikatsuragawa/update-README.md

Update README.md

Author: lanzagar

README.md

@@ -24,21 +24,28 @@ Orange requires Python 3.6 or newer.
 
 First, install [Miniconda] for your OS. Create virtual environment for Orange:
 
-    conda create python=3 --name orange3
-
+```Shell
+conda create python=3 --name orange3
+```
 In your Anaconda Prompt add conda-forge to your channels:
 
-    conda config --add channels conda-forge
+```Shell
+conda config --add channels conda-forge
+```
 
 This will enable access to the latest Orange release. Then install Orange3:
 
-    conda install orange3
+```Shell
+conda install orange3
+```
 
 [Miniconda]: https://docs.conda.io/en/latest/miniconda.html
 
 To install the add-ons, follow a similar recipe:
 
-    conda install orange3-<addon name>
+```Shell
+conda install orange3-<addon name>
+```
 
 See specific add-on repositories for details.
 
@@ -47,27 +54,31 @@ Installing with pip
 
 To install Orange with pip, run the following.
 
-    # Install some build requirements via your system's package manager
-    sudo apt install virtualenv build-essential python3-dev
+```Shell
+# Install some build requirements via your system's package manager
+sudo apt install virtualenv build-essential python3-dev
 
-    # Create a separate Python environment for Orange and its dependencies ...
-    virtualenv --python=python3 --system-site-packages orange3venv
-    # ... and make it the active one
-    source orange3venv/bin/activate
+# Create a separate Python environment for Orange and its dependencies ...
+virtualenv --python=python3 --system-site-packages orange3venv
+# ... and make it the active one
+source orange3venv/bin/activate
 
-    # Install Qt dependencies for the GUI
-    pip install PyQt5 PyQtWebEngine
+# Install Qt dependencies for the GUI
+pip install PyQt5 PyQtWebEngine
 
-    # Install Orange
-    pip install orange3
+# Install Orange
+pip install orange3
+```
 
 Starting Orange GUI
 -------------------
 
 To start Orange GUI from the command line, run:
 
-    orange-canvas
-    # or
-    python3 -m Orange.canvas
+```Shell
+orange-canvas
+# or
+python3 -m Orange.canvas
+```
 
 Append `--help` for a list of program options.