replace vendored latex_envs with its pypi package

setup.py

@@ -59,6 +59,7 @@ def main():
             'ipython_genutils',
             'jupyter_contrib_core >=0.3',
             'jupyter_core',
+            'jupyter_latex_envs >=1.3.4',
             'jupyter_nbextensions_configurator',
             'nbconvert',
             'notebook >=4.0',
@@ -89,11 +90,9 @@ def main():
                 'nbextension = jupyter_contrib_nbextensions.application:jupyter_contrib_core_app_subcommands',  # noqa
             ],
             'nbconvert.exporters': [
-                'html_lenvs = jupyter_contrib_nbextensions.nbconvert_support.latex_envs:LenvsHTMLExporter',  # noqa
-                'latex_lenvs = jupyter_contrib_nbextensions.nbconvert_support.latex_envs:LenvsLatexExporter',  # noqa
                 'html_toc = jupyter_contrib_nbextensions.nbconvert_support.toc2:TocExporter',  # noqa
                 'html_embed = jupyter_contrib_nbextensions.nbconvert_support.embedhtml:EmbedHTMLExporter',  # noqa
-                 ],
+            ],
         },
         scripts=[os.path.join('scripts', p) for p in [
             'jupyter-contrib-nbextension',

src/jupyter_contrib_nbextensions/install.py

@@ -8,6 +8,7 @@
 import errno
 import os
 
+import latex_envs
 import psutil
 from jupyter_contrib_core.notebook_compat import nbextensions
 from jupyter_nbextensions_configurator.application import (
@@ -82,13 +83,12 @@ def toggle_install_files(install, user=False, sys_prefix=False, logger=None,
                 'Installing' if install else 'Uninstalling',
                 'to' if install else 'from',
                 'jupyter data directory'))
-    if install:
-        nbextensions.install_nbextension_python(
-            jupyter_contrib_nbextensions.__name__,
-            overwrite=overwrite, symlink=symlink, **kwargs)
-    else:
-        nbextensions.uninstall_nbextension_python(
-            jupyter_contrib_nbextensions.__name__, **kwargs)
+    for mod in [jupyter_contrib_nbextensions, latex_envs]:
+        if install:
+            nbextensions.install_nbextension_python(
+                mod.__name__, overwrite=overwrite, symlink=symlink, **kwargs)
+        else:
+            nbextensions.uninstall_nbextension_python(mod.__name__, **kwargs)
 
 
 def toggle_install_config(install, user=False, sys_prefix=False, logger=None):