Fix various typos

Found via `codespell -q 3`

.github/workflows/downstream.yml

@@ -39,7 +39,7 b' jobs:'
     - name: Install and update Python dependencies
       run: |
         python -m pip install --upgrade -e file://$PWD#egg=ipython[test]
-        # we must instal IPython after ipykernel to get the right versions.
+        # we must install IPython after ipykernel to get the right versions.
         python -m pip install --upgrade --upgrade-strategy eager flaky ipyparallel
         python -m pip install --upgrade 'pytest<7' 
     - name: pytest

IPython/core/completer.py

@@ -1182,7 +1182,7 b' class IPCompleter(Completer):'
 
         # This is a list of names of unicode characters that can be completed
         # into their corresponding unicode value. The list is large, so we
-        # laziliy initialize it on first use. Consuming code should access this
+        # lazily initialize it on first use. Consuming code should access this
         # attribute through the `@unicode_names` property.
         self._unicode_names = None
 
@@ -2070,7 +2070,7 b' class IPCompleter(Completer):'
             indexed.
         line_buffer : optional, str
             The current line the cursor is in, this is mostly due to legacy
-            reason that readline coudl only give a us the single current line.
+            reason that readline could only give a us the single current line.
             Prefer `full_text`.
         text : str
             The current "token" the cursor is in, mostly also for historical

IPython/extensions/tests/test_autoreload.py

@@ -33,7 +33,7 b' from IPython.testing.decorators import skipif_not_numpy'
 
 if platform.python_implementation() == "PyPy":
     pytest.skip(
-        "Current autoreload implementation is extremly slow on PyPy",
+        "Current autoreload implementation is extremely slow on PyPy",
         allow_module_level=True,
     )
 

SECURITY.md

@@ -3,4 +3,4 b''
 ## Reporting a Vulnerability
 
 All IPython and Jupyter security are handled via [e-mail]. 
-You can find more informations on the Jupyter website. https://jupyter.org/security
+You can find more information on the Jupyter website. https://jupyter.org/security

appveyor.yml

@@ -5,7 +5,7 b' matrix:'
 environment:
   global:
     APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
-    COLUMNS: 120  # Appveyor web viwer window width is 130 chars
+    COLUMNS: 120  # Appveyor web viewer window width is 130 chars
 
   matrix:
    - PYTHON: "C:\\Python38"

docs/source/sphinxext.rst

@@ -204,7 +204,7 b" suppress the seed line so it doesn't show up in the rendered output"
           [0.22591016, 0.77731835],
           [0.0072729 , 0.34273127]])
 
-For more information on @supress and @doctest decorators, please refer to the end of this file in
+For more information on @suppress and @doctest decorators, please refer to the end of this file in
 Pseudo-Decorators section.
 
 Another demonstration of multi-line input and output

tools/release_helper.sh

@@ -111,7 +111,7 b' then'
     sleep 1
     echo $BLUE"Saving API to file $PREV_RELEASE"$NOR
     frappuccino IPython IPython.kernel IPython.lib IPython.qt IPython.lib.kernel IPython.html IPython.frontend IPython.external --save IPython-$PREV_RELEASE.json
-    echo $BLUE"comming back to $BRANCH"$NOR
+    echo $BLUE"coming back to $BRANCH"$NOR
     git checkout $BRANCH
     sleep 1
     echo $BLUE"comparing ..."$NOR