DOC/STY: remove white space and hedge language

Author: tacaswell

lib/matplotlib/backends/backend_pgf.py

@@ -777,8 +777,8 @@ def _print_pgf_to_fh(self, fh, *, bbox_inches_restore=None):
 %% Make sure the required packages are loaded in your preamble
 %%   \\usepackage{pgf}
 %%
-%% Also ensure that all the required font packages are loaded; for instance, 
-%% the lmodern package is often necessary when using math font.
+%% Also ensure that all the required font packages are loaded; for instance,
+%% the lmodern package is sometimes necessary when using math font.
 %%   \\usepackage{lmodern}
 %%
 %% Figures using additional raster images can only be included by \\input if

tutorials/text/pgf.py

@@ -189,8 +189,9 @@
 
 * Various math font are compiled and rendered only if corresponding font
   packages are loaded. Specifically, when using ``\mathbf{}`` on Greek letters,
-  the default computer modern font may not contain them, in which case such font
-  is not rendered. Is such scenarios, the ``lmodern`` package may be loaded.
+  the default computer modern font may not contain them, in which case such
+  font is not rendered. Is such scenarios, the ``lmodern`` package should be
+  loaded.
 
 * If you still need help, please see :ref:`reporting-problems`