Suggestions for variables renaming are broken

Summary:

Name refactoring went broken.

Steps to reproduce

1. Make sure the code format standard uses m_ for private members and s_ for static members
2. Look at the warning or simply apply suggestion
    

Expected result:

Until recently, the warning was:

Name 'm_Foo' does not match rule 'Non-public static fields'. Suggested name is 's_Foo'

Actual result:

Now the warning is:

Name 'm_Foo' does not match rule 'Non-public static fields'. Suggested name is 's_MFoo'

Additional information

This is just an example, this issue is reproducible with any prefix, such as k_ for constants etc.
This is a regression