update elements and fix some bugs

lib/src/prism/components/prism-diff.js

Index: lib/src/prism/components/prism-diff.js
diff --git a/lib/src/prism/components/prism-diff.js b/lib/src/prism/components/prism-diff.js
new file mode 100644
index 0000000000000000000000000000000000000000..3c5351c0b6753870552e07e4f9e3521504837946
--- /dev/null
+++ b/lib/src/prism/components/prism-diff.js
@@ -0,0 +1,20 @@
+Prism.languages.diff = {
+	'coord': [
+		// Match all kinds of coord lines (prefixed by "+++", "---" or "***").
+		/^(?:\*{3}|-{3}|\+{3}).*$/m,
+		// Match "@@ ... @@" coord lines in unified diff.
+		/^@@.*@@$/m,
+		// Match coord lines in normal diff (starts with a number).
+		/^\d+.*$/m
+	],
+
+	// Match inserted and deleted lines. Support both +/- and >/< styles.
+	'deleted': /^[-<].+$/m,
+	'inserted': /^[+>].+$/m,
+
+	// Match "different" lines (prefixed with "!") in context diff.
+	'diff': {
+		'pattern': /^!(?!!).+$/m,
+		'alias': 'important'
+	}
+};