Merge pull request #285 from vincentarelbundock/typo

Typo: isntall -> install

doc/sources/interpreters/Python3_original.md

@@ -1,6 +1,6 @@
 ## Python3 original
 
-To get the REPL behaviour (inactive by default) working, you need to isntall the klepto python package: `pip install --user klepto`
+To get the REPL behaviour (inactive by default) working, you need to install the klepto python package: `pip install --user klepto`
 
 Then, to enable the REPL behavior for python in your config file