fix tiff predictor decoding

pdfminer/utils.py

@@ -94,9 +94,9 @@ def shorten_str(s: str, size: int) -> str:
 
 
 def compatible_encode_method(
-    bytesorstring: Union[bytes, str],
-    encoding: str = "utf-8",
-    erraction: str = "ignore",
+        bytesorstring: Union[bytes, str],
+        encoding: str = "utf-8",
+        erraction: str = "ignore",
 ) -> str:
     """When Py2 str.encode is called, it often means bytes.encode in Py3.
 
@@ -127,7 +127,7 @@ def paeth_predictor(left: int, above: int, upper_left: int) -> int:
 
 
 def apply_tiff_predictor(
-    colors: int, columns: int, bitspercomponent: int, data: bytes
+        colors: int, columns: int, bitspercomponent: int, data: bytes
 ) -> bytes:
     """Reverse the effect of the TIFF predictor 2
 
@@ -139,7 +139,7 @@ def apply_tiff_predictor(
     bpp = colors * (bitspercomponent // 8)
     nbytes = columns * bpp
     buf: list[int] = []
-    for scanline_i in range(0, len(data), nbytes + 1):
+    for scanline_i in range(0, len(data), nbytes):
         raw: list[int] = []
         for i in range(nbytes):
             new_value = data[scanline_i + i]
@@ -153,11 +153,11 @@ def apply_tiff_predictor(
 
 
 def apply_png_predictor(
-    pred: int,
-    colors: int,
-    columns: int,
-    bitspercomponent: int,
-    data: bytes,
+        pred: int,
+        colors: int,
+        columns: int,
+        bitspercomponent: int,
+        data: bytes,
 ) -> bytes:
     """Reverse the effect of the PNG predictor
 
@@ -173,7 +173,7 @@ def apply_png_predictor(
     line_above = list(b"\x00" * columns)
     for scanline_i in range(0, len(data), nbytes + 1):
         filter_type = data[scanline_i]
-        line_encoded = data[scanline_i + 1 : scanline_i + 1 + nbytes]
+        line_encoded = data[scanline_i + 1: scanline_i + 1 + nbytes]
         raw = []
 
         if filter_type == 0:
@@ -360,9 +360,9 @@ def get_bound(pts: Iterable[Point]) -> Rect:
 
 
 def pick(
-    seq: Iterable[_T],
-    func: Callable[[_T], float],
-    maxobj: Optional[_T] = None,
+        seq: Iterable[_T],
+        func: Callable[[_T], float],
+        maxobj: Optional[_T] = None,
 ) -> Optional[_T]:
     """Picks the object obj where func(obj) has the highest value."""
     maxscore = None