Fix typos (#19)

* Fix typos

Found via `typos --format brief`

* Fix doc build

* Update conf.py

---------

Co-authored-by: Stuart Mumford <stuart@cadair.com>

docs/conf.py

@@ -55,7 +55,7 @@
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
+intersphinx_mapping = {'python': ('https://docs.python.org/', None)}
 
 # -- Options for HTML output -------------------------------------------------
 

docs/index.rst

@@ -47,7 +47,7 @@ Skipping towncrier on Release Builds
 
 If you combine the towncrier and changelog file options, when the documentation builds on a release there will be no fragments to render.
 This means that towncrier will still render an empty changelog duplicating the pre-rendered header for the release.
-To disable towncrier output if no fragment files are found add the ``:towncrier-skip-if-emtpy:`` option to the directive:
+To disable towncrier output if no fragment files are found add the ``:towncrier-skip-if-empty:`` option to the directive:
 
 .. code-block:: rst
 

tox.ini

@@ -8,14 +8,14 @@ isolated_build = true
 skip_missing_interpreters = True
 
 [testenv]
-# Pass through the following environemnt variables which may be needed for the CI
+# Pass through the following environment variables which may be needed for the CI
 passenv = HOME,WINDIR,LC_ALL,LC_CTYPE,CC,CI,TRAVIS
 
 # Run the tests in a temporary directory to make sure that we don't import
 # the package from the source tree
 changedir = .tmp/{envname}
 
-# tox environments are constructued with so-called 'factors' (or terms)
+# tox environments are constructed with so-called 'factors' (or terms)
 # separated by hyphens, e.g. test-devdeps-cov. Lines below starting with factor:
 # will only take effect if that factor is included in the environment name. To
 # see a list of example environments that can be run, along with a description,