Fix two regressions introduced by #11072.

There, concrete evidence that I shouldn't try doing such things at 1:30am.

src/etc/ctags.rust

@@ -3,10 +3,9 @@
 --regex-Rust=/^[ \t]*(pub[ \t]+)?fn[ \t]+([a-zA-Z0-9_]+)/\2/f,functions,function definitions/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?type[ \t]+([a-zA-Z0-9_]+)/\2/T,types,type definitions/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?enum[ \t]+([a-zA-Z0-9_]+)/\2/g,enum,enumeration names/
---regex-Rust=/^[ \t]*(pub[ \t]+)?enum[ \t]+([a-zA-Z0-9_]+)/\2/g,enum,enumeration names/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?struct[ \t]+([a-zA-Z0-9_]+)/\2/s,structure names/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?mod[ \t]+([a-zA-Z0-9_]+)/\2/m,modules,module names/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?static[ \t]+([a-zA-Z0-9_]+)/\2/c,consts,static constants/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?trait[ \t]+([a-zA-Z0-9_]+)/\2/t,traits,traits/
 --regex-Rust=/^[ \t]*(pub[ \t]+)?impl([ \t\n]+<.*>)?[ \t]+([a-zA-Z0-9_]+)/\3/i,impls,trait implementations/
---regex-Rust=/^[ \t]*macro_rules![ \t]+([a-zA-Z0-9_]+)/\2/d,macros,macro definitions/
+--regex-Rust=/^[ \t]*macro_rules![ \t]+([a-zA-Z0-9_]+)/\1/d,macros,macro definitions/