docs(typography0: Adds guidance for line length.

Author: edonehoo

packages/documentation-site/patternfly-docs/content/design-guidelines/components/content/content.md

@@ -13,6 +13,10 @@ When using the content component, the content type that you use will align with
 
 Margins will be automatically applied to the content component, based on its location in the overall page. If it's the first item on the page, there will be no top margin. If it's the final item on the page, there will be no bottom margin.
 
+### Line length 
+
+Follow our [typography guidelines](/design-guidelines/typography#line-length) for line length, which recommend staying between 20 and 100 characters for better readability. 
+
 ### When to use content vs. title
 
 **Use content:** 

packages/documentation-site/patternfly-docs/content/design-guidelines/styles/typography/typography.md

@@ -97,3 +97,9 @@ Your overall line height can be calculated by multiplying the font's built-in li
 For example, if your font has a line height of 1.5 and a size of 16px, the final height of a line of text would be 24px (16px * 1.5 = 24px). In this example, you would consider the final line height of 24px when creating designs. 
 
 ![Correct and incorrect text spacing examples.](./line-height.png)
+
+## Line length
+
+Line length measures the number of characters in a single line of text, including spaces. To increase readability and contribute to well-balanced spacing on a screen, use line lengths between 20 and 100 characters. 
+
+Lines that are too long can be difficult to follow, while lines that only include a few words per line can use space inefficiently.