Placement of "*" and "&" inconsistent

[sdutoit]

The prevailing style is "int& foo" and "int* foo". I fixed pointers to be more consistent in ce29631; fix references too.

[tkoeppe]

Very unlikely do be done.

[timsong-cpp]

I did test several different regexes before submitting #1183 and didn't find anything else.

[tkoeppe]

Things that come to mind:

• angle brackets
• ellipses
• decltype
• casts (new- and old-style)