Change "Source File:" to "SourceFile:" in mapper
Change "Source File:" to "SourceFile:" in mapper

Typically, a ProGuard configuration will use the following line to replace
the name of the source file in every class:

    -renamesourcefileattribute SourceFile

Because of this, in order for method name deobfuscation to work as
expected, the mapper needs to look for the string "SourceFile:" instead of
"Source File:" when finding the line number after a method name.

uaraven/unguard