reinstate comment format

Co-authored-by: Romaric Jodin <rjodin@chromium.org>

src/printf.cpp

@@ -257,10 +257,10 @@ void process_printf(char*& data, const printf_descriptor_map_t& descs,
         } else {
             // Vector argument
             if (el_size == 0) {
-                // 'ele_size == 0' means that no length modifier has been
-                // used. According to the spec, this is an undefined
-                // behavior. Let's use the size coming from clspv and the
-                // vec_len to figure out the element size then.
+                // 'ele_size == 0' means that no length modifier has been used.
+                // According to the spec, this is an undefined behavior. Let's
+                // use the size coming from clspv and the vec_len to figure out
+                // the element size then.
                 el_size = size / vec_len;
             }
             auto* data_start = data;