coverage. put mcdc warnings in alphabetical order

Author: zhuyunxing

compiler/rustc_mir_build/messages.ftl

@@ -97,6 +97,8 @@ mir_build_deref_raw_pointer_requires_unsafe_unsafe_op_in_unsafe_fn_allowed =
     .note = raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
     .label = dereference of raw pointer
 
+mir_build_exceeds_mcdc_condition_num_limit =  Conditions number of the decision ({$conditions_num}) exceeds limit ({$max_conditions_num}). MCDC analysis will not count this expression.
+
 mir_build_extern_static_requires_unsafe =
     use of extern static is unsafe and requires unsafe block
     .note = extern statics are not controlled by the Rust type system: invalid data, aliasing violations or data races will cause undefined behavior
@@ -406,5 +408,3 @@ mir_build_unused_unsafe_enclosing_block_label = because it's nested under this `
 mir_build_variant_defined_here = not covered
 
 mir_build_wrap_suggestion = consider wrapping the function body in an unsafe block
-
-mir_build_exceeds_mcdc_condition_num_limit =  Conditions number of the decision ({$conditions_num}) exceeds limit ({$max_conditions_num}). MCDC analysis will not count this expression.