(no bug) Remove some whitespace on blank line, in configure.in. whitespace-only, DONTBUILD

configure.in

@@ -1426,7 +1426,7 @@ if test "$GNU_CC"; then
     MOZ_C_SUPPORTS_WARNING(-W, type-limits, ac_c_has_wtype_limits)
     MOZ_C_SUPPORTS_WARNING(-W, empty-body, ac_c_has_wempty_body)
     MOZ_C_SUPPORTS_WARNING(-W, sign-compare, ac_c_has_sign_compare)
-    
+
     # Turn off the following warnings that -Wall turns on:
     # -Wno-unused - lots of violations in third-party code
     #