bpo-40260: Remove unnecessary newline in compile() call (GH-19641)

Because some people subclass this class and call undocumented methods, and we don't want to break them.

Lib/modulefinder.py

@@ -339,7 +339,7 @@ class ModuleFinder:
             self.msgout(2, "load_module ->", m)
             return m
         if type == _PY_SOURCE:
-            co = compile(fp.read()+b'\n', pathname, 'exec')
+            co = compile(fp.read(), pathname, 'exec')
         elif type == _PY_COMPILED:
             try:
                 data = fp.read()