Fill in syntactically valid deprecation version in tests

Author: dtolnay

tests/ui/stability-attribute/stability-attribute-sanity.rs

@@ -41,7 +41,7 @@ mod missing_version {
     fn f2() { }
 
     #[stable(feature = "a", since = "4.4.4")]
-    #[deprecated(since = "a")] //~ ERROR missing 'note' [E0543]
+    #[deprecated(since = "5.5.5")] //~ ERROR missing 'note' [E0543]
     fn f3() { }
 }
 
@@ -58,8 +58,8 @@ fn multiple2() { }
 fn multiple3() { }
 
 #[stable(feature = "e", since = "b")] //~ ERROR 'since' must be a Rust version number, such as "1.31.0"
-#[deprecated(since = "b", note = "text")]
-#[deprecated(since = "b", note = "text")] //~ ERROR multiple `deprecated` attributes
+#[deprecated(since = "5.5.5", note = "text")]
+#[deprecated(since = "5.5.5", note = "text")] //~ ERROR multiple `deprecated` attributes
 #[rustc_const_unstable(feature = "c", issue = "none")]
 #[rustc_const_unstable(feature = "d", issue = "none")] //~ ERROR multiple stability levels
 pub const fn multiple4() { }
@@ -69,7 +69,7 @@ pub const fn multiple4() { }
 #[deprecated(since = "invalid", note = "text")]
 fn invalid_deprecation_version() {}
 
-#[deprecated(since = "a", note = "text")]
+#[deprecated(since = "5.5.5", note = "text")]
 fn deprecated_without_unstable_or_stable() { }
 //~^^ ERROR deprecated attribute must be paired with either stable or unstable attribute
 

tests/ui/stability-attribute/stability-attribute-sanity.stderr

@@ -1,14 +1,14 @@
 error: multiple `deprecated` attributes
   --> $DIR/stability-attribute-sanity.rs:62:1
    |
-LL | #[deprecated(since = "b", note = "text")]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove this attribute
+LL | #[deprecated(since = "5.5.5", note = "text")]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove this attribute
    |
 note: attribute also specified here
   --> $DIR/stability-attribute-sanity.rs:61:1
    |
-LL | #[deprecated(since = "b", note = "text")]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | #[deprecated(since = "5.5.5", note = "text")]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0541]: unknown meta item 'reason'
   --> $DIR/stability-attribute-sanity.rs:8:46
@@ -73,8 +73,8 @@ LL |     #[deprecated(note = "a")]
 error[E0543]: missing 'note'
   --> $DIR/stability-attribute-sanity.rs:44:5
    |
-LL |     #[deprecated(since = "a")]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |     #[deprecated(since = "5.5.5")]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0544]: multiple stability levels
   --> $DIR/stability-attribute-sanity.rs:49:1
@@ -118,8 +118,8 @@ LL | fn invalid_deprecation_version() {}
 error[E0549]: deprecated attribute must be paired with either stable or unstable attribute
   --> $DIR/stability-attribute-sanity.rs:72:1
    |
-LL | #[deprecated(since = "a", note = "text")]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | #[deprecated(since = "5.5.5", note = "text")]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0711]: feature `a` is declared stable since 1.0.0, but was previously declared stable since 4.4.4
   --> $DIR/stability-attribute-sanity.rs:67:1