Use Return instead of Enter

Author: maxim-belkin

_episodes/00-Before-we-start.md

@@ -107,11 +107,11 @@ You may want additional directories or subdirectories depending on your project
 The basis of programming is that we write down instructions for the computer to follow, and then we tell the computer to follow those instructions. We write, or code, instructions in Python because it is a common language that both the computer and we can understand. We call the instructions commands and we tell the computer to follow the instructions by executing (also called running) those commands.
 
 ##### If you are working with Jupyter notebook:
-You can type Python code into a code cell and then execute the code by pressing <kbd>Shift</kbd> + <kbd>Enter</kbd>. Any output will be printed directly under the input cell. You can recognise a code cell by the `In[ ]:` at the beginning of the cell and output is marked by `Out[ ]:`. Pressing the __+__ button in the menu bar will add a new cell. All your commands as well as any output will be saved with the notebook.
+You can type Python code into a code cell and then execute the code by pressing <kbd>Shift</kbd>+<kbd>Return</kbd>. Any output will be printed directly under the input cell. You can recognise a code cell by the `In[ ]:` at the beginning of the cell and output is marked by `Out[ ]:`. Pressing the __+__ button in the menu bar will add a new cell. All your commands as well as any output will be saved with the notebook.
 
 ##### If you are working with Spyder:
 
-You can either use the console or use script files (plain text files that contain your code). The console pane (in Spyder, the bottom right panel) is the place where commands written in the Python language can be typed and executed immediately by the computer. It is also where the results will be shown for commands that have been executed. You can type commands directly into the console and press Enter to execute those commands, but they will be forgotten when you close the session. Spyder uses the [IPython](http://ipython.org) console by default.
+You can either use the console or use script files (plain text files that contain your code). The console pane (in Spyder, the bottom right panel) is the place where commands written in the Python language can be typed and executed immediately by the computer. It is also where the results will be shown for commands that have been executed. You can type commands directly into the console and press <kbd>Return</kbd> to execute those commands, but they will be forgotten when you close the session. Spyder uses the [IPython](http://ipython.org) console by default.
 
 Because we want our code and workflow to be reproducible, it is better to type the commands we want in the script editor, and save the script. This way, there is a complete record of what we did, and anyone (including our future selves!) can easily replicate the results on their computer.
 

_episodes/00-short-introduction-to-Python.md

@@ -71,7 +71,7 @@ pi_value = 3.1415  # An example of a float
 
 Here we've assigned data to the variables `text`, `number` and `pi_value`,
 using the assignment operator `=`. To review the value of a variable, we
-can type the name of the variable into the interpreter and press `Enter`:
+can type the name of the variable into the interpreter and press <kbd>Return</kbd>:
 
 ~~~
 >>> text

_extras/jupyter_notebooks.md

@@ -49,7 +49,7 @@ After typing the command `jupyter notebook`, the following happens:
   *A Code cell*
 
 * This is a **Code** cell (see the cell type dropdown with the word **Code**).
-  To run the cell, type Shift-Enter.
+  To run the cell, type <kbd>Shift</kbd>+<kbd>Return</kbd>.
 
   ![Code cell and its output](../fig/00_6_jupyter_code_after.png)
   *A Code cell and its output*
@@ -62,7 +62,7 @@ After typing the command `jupyter notebook`, the following happens:
   ![markdown input cell](../fig/00_7_jupyter_markdown_before.png)
   *A markdown input cell*
 
-* To run the cell, type Shift-Enter.
+* To run the cell, type <kbd>Shift</kbd>+<kbd>Return</kbd>.
 
   ![rendered markdown cell](../fig/00_8_jupyter_markdown_after.png)
   *A rendered markdown cell*

reference.md

@@ -55,7 +55,7 @@ integer
 interactive mode
 :   is an online mode of operation in which the user writes the commands directly
     on the command line one-by-one and execute them immediately by pressing a button
-    on the keyword, usually Enter.
+    on the keyword, usually <kbd>Return</kbd>.
 
 join key
 :   is a variable or an array representing the column names over which pandas.DataFrame.join()