diff --git a/repo_subpaths_for_grammar_check.md b/repo_subpaths_for_grammar_check.md
index 9137f47b87..46a5848eda 100644
--- a/repo_subpaths_for_grammar_check.md
+++ b/repo_subpaths_for_grammar_check.md
@@ -21,7 +21,7 @@ Status legend: `[ ]` pending, `[~]` in progress, `[x]` complete
 
 - [x] `src/ethereum/forks/*/vm/precompiled_contracts/__init__.py`, `mapping.py` (~48 files)
 - [x] `src/ethereum/forks/*/vm/precompiled_contracts/ecrecover.py`, `sha256.py`, `ripemd160.py`, `identity.py` (~96 files)
-- [ ] `src/ethereum/forks/*/vm/precompiled_contracts/modexp.py`, `alt_bn128.py` (~38 files)
+- [x] `src/ethereum/forks/*/vm/precompiled_contracts/modexp.py`, `alt_bn128.py` (~38 files)
 - [ ] `src/ethereum/forks/*/vm/precompiled_contracts/blake2f.py` (~17 files)
 - [ ] `src/ethereum/forks/*/vm/precompiled_contracts/point_evaluation.py`, `p256verify.py` (~16 files)
 - [ ] `src/ethereum/forks/*/vm/precompiled_contracts/bls12_381/*.py` (~32 files)
diff --git a/src/ethereum/forks/amsterdam/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/amsterdam/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/amsterdam/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/amsterdam/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/arrow_glacier/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/arrow_glacier/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/arrow_glacier/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/arrow_glacier/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/berlin/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/berlin/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/berlin/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/berlin/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/bpo1/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/bpo1/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/bpo1/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/bpo1/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/bpo2/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/bpo2/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/bpo2/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/bpo2/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/bpo3/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/bpo3/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/bpo3/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/bpo3/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/bpo4/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/bpo4/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/bpo4/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/bpo4/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/bpo5/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/bpo5/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/bpo5/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/bpo5/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/byzantium/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/byzantium/vm/precompiled_contracts/modexp.py
index fd0501616c..8ed5c851a7 100644
--- a/src/ethereum/forks/byzantium/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/byzantium/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/cancun/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/cancun/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/cancun/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/cancun/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/constantinople/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/constantinople/vm/precompiled_contracts/modexp.py
index fd0501616c..8ed5c851a7 100644
--- a/src/ethereum/forks/constantinople/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/constantinople/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/gray_glacier/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/gray_glacier/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/gray_glacier/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/gray_glacier/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/istanbul/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/istanbul/vm/precompiled_contracts/modexp.py
index fd0501616c..8ed5c851a7 100644
--- a/src/ethereum/forks/istanbul/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/istanbul/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/london/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/london/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/london/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/london/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/muir_glacier/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/muir_glacier/vm/precompiled_contracts/modexp.py
index fd0501616c..8ed5c851a7 100644
--- a/src/ethereum/forks/muir_glacier/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/muir_glacier/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/osaka/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/osaka/vm/precompiled_contracts/modexp.py
index 5e7e895b91..bf828ee8f6 100644
--- a/src/ethereum/forks/osaka/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/osaka/vm/precompiled_contracts/modexp.py
@@ -22,7 +22,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/paris/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/paris/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/paris/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/paris/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/prague/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/prague/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/prague/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/prague/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data
diff --git a/src/ethereum/forks/shanghai/vm/precompiled_contracts/modexp.py b/src/ethereum/forks/shanghai/vm/precompiled_contracts/modexp.py
index 462341f69f..755a396dda 100644
--- a/src/ethereum/forks/shanghai/vm/precompiled_contracts/modexp.py
+++ b/src/ethereum/forks/shanghai/vm/precompiled_contracts/modexp.py
@@ -23,7 +23,7 @@
 
 def modexp(evm: Evm) -> None:
     """
-    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and.
+    Calculates `(base**exp) % modulus` for arbitrary sized `base`, `exp` and
     `modulus`. The return value is the same length as the modulus.
     """
     data = evm.message.data