Fix typos in repo (#285)

Author: mcbarton

CONTRIBUTING.md

@@ -18,7 +18,7 @@ minutes of past meetings can be found on our
 ## Setting up a development environment
 
 First, you need to fork the project. After you have done this clone your forked repo. You can do this by 
-executing the folowing
+executing the following
 
 ```bash
 git clone https://github.com/<your-github-username>/xeus-cpp.git
@@ -35,7 +35,7 @@ micromamba create -f environment-dev.yml -y
 micromamba activate xeus-cpp
 ```
 
-You are now in a position to install xeus-cpp into this envirnoment. You can do this by executing
+You are now in a position to install xeus-cpp into this environment. You can do this by executing
 
 ```bash
 mkdir build
@@ -61,7 +61,7 @@ pytest -sv test_xcpp_kernel.py
 ## Setting up a development environment (wasm instructions)
 
 First, you need to fork the project. After you have done this clone your forked repo. You can do this by 
-executing the folowing
+executing the following
 
 ```bash
 git clone https://github.com/<your-github-username>/xeus-cpp.git

docs/source/InstallationAndUsage.rst

@@ -100,7 +100,7 @@ Once the Jupyter Lite site has built you can test the website locally by executi
 Installing from conda-forge
 ===========================
 
-If you have conda installed then you can install xeus-cpp using the follwing command
+If you have conda installed then you can install xeus-cpp using the following command
 
 .. code-block:: bash
 

share/xeus-cpp/tagfiles/cppreference-doxygen-web.tag

@@ -38138,8 +38138,8 @@
     </member>
     <member kind="function">
       <type>T</type>
-      <name>select_on_container_copy_contruction</name>
-      <anchorfile>cpp/memory/polymorphic_allocator/select_on_container_copy_contruction</anchorfile>
+      <name>select_on_container_copy_construction</name>
+      <anchorfile>cpp/memory/polymorphic_allocator/select_on_container_copy_construction</anchorfile>
       <anchor></anchor>
       <arglist>(T... args)</arglist>
     </member>