Update lib/matplotlib/texmanager.py

Co-authored-by: Elliott Sales de Andrade <quantum.analyst@gmail.com>

Author: oscargus

lib/matplotlib/texmanager.py

@@ -57,7 +57,7 @@ class TexManager:
     """
     Convert strings to dvi files using TeX, caching the results to a directory.
 
-    The cache directory is called ``tex.cache`` and is located is the directory
+    The cache directory is called ``tex.cache`` and is located in the directory
     returned by `.get_cachedir`.
 
     Repeated calls to this constructor always return the same instance.