Auto merge of #3880 - MicroJoe:align-image-tests, r=Turbo87

render: fix center image test

The image test is actually not representative and will not center the image. This fix helps users discover how to center images and proves that they will be centered on crates.io.

Note: I am the original author of this testcase from PR #3862

Author: bors

src/render.rs

@@ -534,11 +534,11 @@ mod tests {
     #[test]
     fn image_alignment() {
         let text =
-            "<img src=\"https://img.shields.io/crates/v/clap.svg\" alt=\"\" align=\"center\">\n";
+            "<p align=\"center\"><img src=\"https://img.shields.io/crates/v/clap.svg\" alt=\"\"></p>\n";
         let result = markdown_to_html(text, None);
         assert_eq!(
             result,
-            "<img src=\"https://img.shields.io/crates/v/clap.svg\" alt=\"\" align=\"center\">\n"
+            "<p align=\"center\"><img src=\"https://img.shields.io/crates/v/clap.svg\" alt=\"\"></p>\n"
         );
     }
 }