fixing Acrolinx issues

Author: twooley

articles/cdn/cdn-http-debug-headers.md

@@ -147,7 +147,7 @@ The terms used in the above response header syntax are defined as follows:
 
 - MATimePeriod: Converts the max-age value (that is, MASeconds) to the approximate equivalent of a larger unit (for example, days). 
 
-- UnixTime: Indicates the cache timestamp of the requested content in Unix time (a.k.a. POSIX time or Unix epoch). The cache timestamp indicates the starting date/time from which an asset's TTL will be calculated. 
+- UnixTime: Indicates the cache timestamp of the requested content in Unix time (also known as POSIX time or Unix epoch). The cache timestamp indicates the starting date/time from which an asset's TTL will be calculated. 
 
     If the origin server does not utilize a third-party HTTP caching server or if that server does not return the Age response header, then the cache timestamp will always be the date/time when the asset was retrieved or revalidated. Otherwise, the POP servers will use the Age field to calculate the asset's TTL as follows: Retrieval/RevalidateDateTime - Age.
 

articles/cdn/cdn-http-variables.md

@@ -124,9 +124,9 @@ The following table describes how to define a default value.
 
 | Condition | Syntax | Example | Description |
 | --------- | ------ | --------| ----------- |
-| Set a header to a default value when it meets any of the following conditions: <br /><br />- Missing Header <br /><br />- Header value is set to NULL.| %{Variable:=Value} | %{http_referer:=unspecified} | The Referer header will only be set to *unspecified* when it is either missing or set to NULL. No action will take place if it has been set. |
-| Set a header to a default value when it is missing. | %{Variable=Value} | %{http_referer=unspecified} | The Referer header will only be set to *unspecified* when it is missing. No action will take place if it has been set. |
-| Set the header to a default value when it does not meet any of the following conditions: <br /><br />- Missing<br /><br /> - Set to NULL. | %{Variable:+Value} | %{http_referer:+unspecified} | The Referer header will only be set to *unspecified* when a value has been assigned to it. No action will take place if it is either missing or set to NULL. |
+| Set a header to a default value when it meets any of the following conditions: <br /><br />- Missing Header <br /><br />- Header value is set to NULL.| %{Variable:=Value} | %{http_referrer:=unspecified} | The Referrer header will only be set to *unspecified* when it is either missing or set to NULL. No action will take place if it has been set. |
+| Set a header to a default value when it is missing. | %{Variable=Value} | %{http_referrer=unspecified} | The Referrer header will only be set to *unspecified* when it is missing. No action will take place if it has been set. |
+| Set the header to a default value when it does not meet any of the following conditions: <br /><br />- Missing<br /><br /> - Set to NULL. | %{Variable:+Value} | %{http_referrer:+unspecified} | The Referrer header will only be set to *unspecified* when a value has been assigned to it. No action will take place if it is either missing or set to NULL. |
 
 ## Manipulating variables
 Variables can be manipulated in the following ways:

articles/cdn/cdn-verizon-premium-rules-engine-reference-features.md

@@ -513,7 +513,7 @@ The format for specifying request and response headers is defined as follows:
 
 Header Type|Format|Examples
 -|-|-
-Request Header|%{[RequestHeader]()}[i]() | %{Accept-Encoding}i <br/> {Referer}i <br/> %{Authorization}i
+Request Header|%{[RequestHeader]()}[i]() | %{Accept-Encoding}i <br/> {Referrer}i <br/> %{Authorization}i
 Response Header|%{[ResponseHeader]()}[o]()| %{Age}o <br/> %{Content-Type}o <br/> %{Cookie}o
 
 Key information: