Fix RST backticks

.pre-commit-config.yaml

@@ -14,30 +14,30 @@ repos:
       - id: isort
 
   - repo: https://github.com/asottile/yesqa
-    rev: b13a51aa54142c59219c764e9f9362c049b439ed  # frozen: v1.2.0
+    rev: 7a009f3ee493c796827ee334f9058b110a0e0db8  # frozen: v1.2.1
     hooks:
       - id: yesqa
 
   - repo: https://github.com/Lucas-C/pre-commit-hooks
-    rev: ffbd448645bad2e7ca13f96fca5830058d27ccd5  # frozen: v1.1.7
+    rev: f30f4974a08a6b2f6a1eeaf30a4d501cf909163a  # frozen: v1.1.9
     hooks:
       - id: remove-tabs
         exclude: (Makefile$|\.bat$|\.cmake$|\.eps$|\.fits$|\.opt$)
 
   - repo: https://gitlab.com/pycqa/flake8
-    rev: 735cfe7e1c57a8e05f660ba75de72313005af54a  # frozen: 3.8.2
+    rev: 05f6544aef321e2fee03a1277ce2eef8880fb927  # frozen: 3.8.3
     hooks:
       - id: flake8
         additional_dependencies: [flake8-2020, flake8-implicit-str-concat]
 
   - repo: https://github.com/pre-commit/pygrep-hooks
-    rev: 0d7d077d6ed5624854f93ac601739c1804ebeb98  # frozen: v1.5.1
+    rev: 20b9ac745c5adaab12b845b3564c773dcc051d0e  # frozen: v1.5.2
     hooks:
       - id: python-check-blanket-noqa
       - id: rst-backticks
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: ebc15addedad713c86ef18ae9632c88e187dd0af  # frozen: v3.1.0
+    rev: e1668fe86af3810fbca72b8653fe478e66a0afdc  # frozen: v3.2.0
     hooks:
       - id: check-merge-conflict
       - id: check-yaml

docs/reference/block_allocator.rst

@@ -40,7 +40,7 @@ variables:
 
   * ``PILLOW_BLOCK_SIZE``, in bytes, K, or M.  Specifies the maximum
     block size for ``ImagingAllocateArray``. Valid values are
-    integers, with an optional `k` or `m` suffix. Defaults to 16M.
+    integers, with an optional ``k`` or ``m`` suffix. Defaults to 16M.
 
   * ``PILLOW_BLOCKS_MAX`` Specifies the number of freed blocks to
     retain to fill future memory requests. Any freed blocks over this