Minor changes in documentation.

Author: plusvic

docs/conf.py

@@ -44,7 +44,7 @@
 
 # General information about the project.
 project = u'yara'
-copyright = u'2014-2019, VirusTotal'
+copyright = u'2014-2020, VirusTotal'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the

docs/modules/pe.rst

@@ -883,7 +883,7 @@ Reference
 
     .. versionadded:: 4.0.0
 
-    Structure containing information about the PE's exports.
+    Array of structures containing information about the PE's exports.
 
     .. c:member:: offset
 

docs/writingrules.rst

@@ -1262,8 +1262,8 @@ This is equivalent to:
 The new syntax is more natural and easy to understand, and is the recommended
 way of expressing this type of conditions in newer versions of YARA.
 
-For while iterating dictionaries you must provide to variable names that will
-hold the key and value of each entry in the dictionary, for example:
+While iterating dictionaries you must provide two variable names that will
+hold the key and value for each entry in the dictionary, for example:
 
 .. code-block:: yara