Renamed and relocated if-let font-lock test

Author: jjwest

rust-mode-tests.el

@@ -1317,6 +1317,15 @@ list of substrings of `STR' each followed by its face."
      "mut" font-lock-keyword-face
      "bar" font-lock-variable-name-face)))
 
+(ert-deftest font-lock-if-let-binding ()
+  (rust-test-font-lock
+   "if let Some(var) = some_var { /* no-op */ }"
+   '("if" font-lock-keyword-face
+     "let" font-lock-keyword-face
+     "Some" font-lock-type-face
+     "/* " font-lock-comment-delimiter-face
+     "no-op */" font-lock-comment-face)))
+
 (ert-deftest font-lock-single-quote-character-literal ()
   (rust-test-font-lock
    "fn main() { let ch = '\\''; }"
@@ -2345,15 +2354,6 @@ fn main() {
      "/* " font-lock-comment-delimiter-face
      "no-op */" font-lock-comment-face)))
 
-(ert-deftest rust-if-let-type-font-lock ()
-  (rust-test-font-lock
-   "if let Some(var) = some_var { /* no-op */ }"
-   '("if" font-lock-keyword-face
-     "let" font-lock-keyword-face
-     "Some" font-lock-type-face
-     "/* " font-lock-comment-delimiter-face
-     "no-op */" font-lock-comment-face)))
-
 (ert-deftest rust-test-basic-paren-matching ()
   (rust-test-matching-parens
    "