Update

snippets/latex-mode/hat

@@ -0,0 +1,15 @@
+# -*- mode: snippet -*-
+# name: hat
+# key: hat
+# type: command
+# condition: (and (texmathp) 'auto)
+# group: math
+# --
+(let ((argument t))
+  (condition-case nil
+      (progn
+        (backward-sexp)
+        (kill-sexp)
+        (delete-char 1))
+    (error (setq argument 'nil)))
+  (insert "\\hat{" (if argument (current-kill 0) "") "}"))