diff --git a/.github/workflows/cpplint_modified_files.yml b/.github/workflows/cpplint_modified_files.yml
index f4b1e276e..d8fd59ad1 100644
--- a/.github/workflows/cpplint_modified_files.yml
+++ b/.github/workflows/cpplint_modified_files.yml
@@ -1,8 +1,9 @@
-# GitHub Action that allows for gradual compliance with cpplint as only files added or
-#     modified are checked.
-# 1. runs cpplint only on those files that have been modified vs. origin/master
-# 2. compiles with g++ only on those files that have been modified vs. origin/master
-# 3. Other optional filepath verifications can be commented out at the end of this file.
+# GitHub Action that enables a repo to achieve gradual compliance with cpplint by
+#     linting only those files that have been added or modified (vs. origin/master).
+# 1. runs cpplint only on those files that have been modified vs. origin/master.
+# 2. compiles with g++ only those files that have been modified vs. origin/master.
+# 3. other optional filepath verifications may be commented out at the end of this file.
+# From: https://github.com/cpplint/GitHub-Action-for-cpplint
 
 name: cpplint_modified_files
 on: [push, pull_request]
@@ -12,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
-      - shell: python  # Show shell: python version and then upgrade shell: python to Python 3.8
+      - shell: python  # Show the version of shell: python and then upgrade shell: python to Python 3.8
         run: import sys ; print("Python {}.{}.{}".format(*sys.version_info))  # Legacy Python :-(
       - run: sudo update-alternatives --install /usr/bin/python python ${pythonLocation}/bin/python3.8 10
       - run: python -m pip install cpplint
@@ -25,14 +26,14 @@ jobs:
           import subprocess
           import sys
 
-          print("Python {}.{}.{}".format(*sys.version_info))  # Python 3.8.0
+          print("Python {}.{}.{}".format(*sys.version_info))  # Python 3.8
           with open("git_diff.txt") as in_file:
             modified_files = sorted(in_file.read().splitlines())
           print("{} files were modified.".format(len(modified_files)))
 
           cpp_exts = tuple(".c .c++ .cc .cpp .cu .cuh .cxx .h .h++ .hh .hpp .hxx".split())
           cpp_files = [file for file in modified_files if file.lower().endswith(cpp_exts)]
-          print("{} C++ files were modified.".format(len(cpp_files)))
+          print(f"{len(cpp_files)} C++ files were modified.")
           if not cpp_files:
             sys.exit(0)
 
@@ -46,17 +47,17 @@ jobs:
 
           upper_files = [file for file in cpp_files if file != file.lower()]
           if upper_files:
-            print("{} files contain uppercase characters:".format(len(upper_files)))
+            print(f"{len(upper_files)} files contain uppercase characters:")
             print("\n".join(upper_files) + "\n")
 
           space_files = [file for file in cpp_files if " " in file or "-" in file]
           if space_files:
-            print("{} files contain space or dash characters:".format(len(space_files)))
+            print(f"{len(space_files)} files contain space or dash characters:")
             print("\n".join(space_files) + "\n")
 
           nodir_files = [file for file in cpp_files if file.count(os.sep) != 1]
           if nodir_files:
-            print("{} files are not in one and only one directory:".format(len(nodir_files)))
+            print(f"{len(nodir_files)} files are not in one and only one directory:")
             print("\n".join(nodir_files) + "\n")
 
           bad_files = len(upper_files + space_files + nodir_files)