Fix test and move to more appropriate directory

Author: estebank

tests/ui/parser/issues/issue-104088.stderr

@@ -8,10 +8,12 @@ fn 1234test() {
 
     let 23name = 123;
     //~^ ERROR expected identifier, found `23name`
-
+}
+fn foo() {
     let 2x: i32 = 123;
     //~^ ERROR expected identifier, found `2x`
-
+}
+fn bar() {
     let 1x = 123;
     //~^ ERROR expected identifier, found `1x`
 }

tests/ui/parser/issues/issue-104088.rs renamed to tests/ui/parser/recover/binding-name-starting-with-number.rs

@@ -0,0 +1,59 @@
+error: expected identifier, found `1234test`
+  --> $DIR/binding-name-starting-with-number.rs:1:4
+   |
+LL | fn 1234test() {
+   |    ^^^^^^^^ expected identifier
+   |
+help: identifiers cannot start with a number
+  --> $DIR/binding-name-starting-with-number.rs:1:4
+   |
+LL | fn 1234test() {
+   |    ^^^^
+
+error: expected identifier, found `23name`
+  --> $DIR/binding-name-starting-with-number.rs:9:9
+   |
+LL |     let 23name = 123;
+   |         ^^^^^^ expected identifier
+   |
+help: identifiers cannot start with a number
+  --> $DIR/binding-name-starting-with-number.rs:9:9
+   |
+LL |     let 23name = 123;
+   |         ^^
+
+error: expected identifier, found `2x`
+  --> $DIR/binding-name-starting-with-number.rs:13:9
+   |
+LL |     let 2x: i32 = 123;
+   |         ^^ expected identifier
+   |
+help: identifiers cannot start with a number
+  --> $DIR/binding-name-starting-with-number.rs:13:9
+   |
+LL |     let 2x: i32 = 123;
+   |         ^
+
+error: expected identifier, found `1x`
+  --> $DIR/binding-name-starting-with-number.rs:17:9
+   |
+LL |     let 1x = 123;
+   |         ^^ expected identifier
+   |
+help: identifiers cannot start with a number
+  --> $DIR/binding-name-starting-with-number.rs:17:9
+   |
+LL |     let 1x = 123;
+   |         ^
+
+error[E0308]: mismatched types
+  --> $DIR/binding-name-starting-with-number.rs:5:12
+   |
+LL |     if let 2e1 = 123 {
+   |            ^^^   --- this expression has type `{integer}`
+   |            |
+   |            expected integer, found floating-point number
+
+error: aborting due to 5 previous errors
+
+For more information about this error, try `rustc --explain E0308`.