Add new TYPE_BOUND_LIST and TYPE_BOUND syntax kinds

These are now used when parsing type bounds. In addition parsing paths inside a
bound now does not recursively parse paths, rather they are treated as separate
bounds, separated by +.

crates/ra_parser/src/syntax_kind/generated.rs

@@ -228,6 +228,8 @@ pub enum SyntaxKind {
     PARAM,
     SELF_PARAM,
     ARG_LIST,
+    TYPE_BOUND,
+    TYPE_BOUND_LIST,
 }
 use self::SyntaxKind::*;
 
@@ -567,6 +569,8 @@ impl SyntaxKind {
             PARAM => &SyntaxInfo { name: "PARAM" },
             SELF_PARAM => &SyntaxInfo { name: "SELF_PARAM" },
             ARG_LIST => &SyntaxInfo { name: "ARG_LIST" },
+            TYPE_BOUND => &SyntaxInfo { name: "TYPE_BOUND" },
+            TYPE_BOUND_LIST => &SyntaxInfo { name: "TYPE_BOUND_LIST" },
             TOMBSTONE => &SyntaxInfo { name: "TOMBSTONE" },
             EOF => &SyntaxInfo { name: "EOF" },
         }