Add grammar style guide

docs/source/style.rst

@@ -428,3 +428,21 @@ There are two types of comments: *block* and *inline*. A good rule of thumb to f
     i = i & (i-1) == 0:  # true if i is 0 or a power of 2 [explains the concept not the code]
 
 If a comment consists of one or more full sentences (as is typically the case for *block* comments), it should start with an upper case letter and end with a period. *Inline* comments often consist of a brief phrase which is not a full sentence, in which case they should have a lower case initial letter and not have a terminating period.
+
+Documentation Pages
+-------------------
+Documentation that is separate from code (like this page)
+should follow the
+`IEEE Style Manual
+<https://journals.ieeeauthorcenter.ieee.org/your-role-in-article-production/ieee-editorial-style-manual/>`_.
+For additional grammar and usage guidance,
+refer to `The Chicago Manual of Style <https://www.chicagomanualofstyle.org/>`_.
+A few notable guidelines:
+
+    * Do not capitalize acronyms or inititalisms when defining them,
+      e.g., "computer-aided system engineering (CASE),"
+      "fast Fourier transform (FFT)."
+
+The source code (`.rst` files) for these pages
+does not have a line-length guideline,
+but line breaks inside text are encouraged.