Call startswith/endswith once with a tuple

Author: hugovk

src/PIL/IcnsImagePlugin.py

@@ -123,8 +123,7 @@ def read_png_or_jpeg2000(
         Image._decompression_bomb_check(im.size)
         return {"RGBA": im}
     elif (
-        sig.startswith(b"\xff\x4f\xff\x51")
-        or sig.startswith(b"\x0d\x0a\x87\x0a")
+        sig.startswith((b"\xff\x4f\xff\x51", b"\x0d\x0a\x87\x0a"))
         or sig == b"\x00\x00\x00\x0cjP  \x0d\x0a\x87\x0a"
     ):
         if not enable_jpeg2k:

src/PIL/TiffImagePlugin.py

@@ -1584,7 +1584,7 @@ def _setup(self) -> None:
             # byte order.
             elif rawmode == "I;16":
                 rawmode = "I;16N"
-            elif rawmode.endswith(";16B") or rawmode.endswith(";16L"):
+            elif rawmode.endswith((";16B", ";16L")):
                 rawmode = rawmode[:-1] + "N"
 
             # Offset in the tile tuple is 0, we go from 0,0 to