fix typo

Author: hubwriter

code-description.md

@@ -308,7 +308,7 @@ The following variables and constants are used in the script. Except where marke
 
 - **beforeCursor**: Boolean. This is set to true initially. We set it to false as soon as we get to the cursor position during the parsing phase. This allows us to quickly skip any more checking for the cursor position or assigning values related to the versioning message.
 - **currentTagSetID**: a number. This short-lived variable is just used to store the tag set ID of the tag we're currently processing when working out which tags to highlight.
-- **currentTagSpan[]**: an array of numbers. We store an retrieve values by using `nestingLevel` (i.e., `currentTagSpan[nestingLevel]`). The numbers identify the tag span (and possibly ancestor tag spans) in which the cursor is located. The last element in this array contains the ID of the tag span within which the cursor is directly located. Initially this array is empty, meaning the cursor is not within a tag span. Knowing the current tag span (and any ancestor spans), we can use the tag properties to find out which tag set(s) to highlight.
+- **currentTagSpan[]**: an array of numbers. We store and retrieve values by using `nestingLevel` (i.e., `currentTagSpan[nestingLevel]`). The numbers identify the tag span (and possibly ancestor tag spans) in which the cursor is located. The last element in this array contains the ID of the tag span within which the cursor is directly located. Initially this array is empty, meaning the cursor is not within a tag span. Knowing the current tag span (and any ancestor spans), we can use the tag properties to find out which tag set(s) to highlight.
 - **cursorPosition**: (constant) a vscode.Position (i.e. a line number and the number of character on that line where the cursor currently sits).
 - **elsedVersions[]**: an array of strings. As we're parsing through the a tag set, we build a string for each nesting level to use if we reach an `else` tag for the current tag set. The string contains an NOT-ed list of the versions in the `ifversion` and and `elsif` tags in the tag set. For example, if the tag set contains `{% ifversion ghes %} ... {%elsif ghec %} ... {% else %}` then, when we reach the `else` tag `elsedVersions[nestingLevel]` will contain "NOT ghes \nAND NOT ghec". The first time we add a version string to this array `elsedVersions[0]` we prepend "NOT ", and for any subsequent strings in any element of the array we prepend " AND NOT ". If a tag set contains an `else` tag we assign the value of `elsedVersions[nestingLevel]` to `versionDescription[nestingLevel]`.
 - **highlightBackgroundColor**: (constant) an array of strings. Each nesting level, including none, has a different background color. For instance: `highlightBackgroundColor[0]`, for tags in an un-nested tag set, might be "red".