build: handle Makefiles and gyp files in script adding trailing newlines

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: passed
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

---
type: pre_push_report
description: Results of running various checks prior to pushing changes.
report:
  - task: run_javascript_examples
    status: na
  - task: run_c_examples
    status: na
  - task: run_cpp_examples
    status: na
  - task: run_javascript_readme_examples
    status: na
  - task: run_c_benchmarks
    status: na
  - task: run_cpp_benchmarks
    status: na
  - task: run_fortran_benchmarks
    status: na
  - task: run_javascript_benchmarks
    status: na
  - task: run_julia_benchmarks
    status: na
  - task: run_python_benchmarks
    status: na
  - task: run_r_benchmarks
    status: na
  - task: run_javascript_tests
    status: na
---

Author: Planeshifter

.github/workflows/scripts/add_trailing_newlines

@@ -33,7 +33,7 @@ set -o pipefail
 # VARIABLES #
 
 # List of file extensions to process:
-extensions=("js" "mjs" "cjs" "json" "ts" "py" "jl" "R" "c" "h" "cpp" "hpp" "f" "sh" "awk" "html" "xml" "css" "md" "yml" "gypi" "bib" "tex")
+extensions=("js" "mjs" "cjs" "json" "ts" "py" "jl" "R" "c" "h" "cpp" "hpp" "f" "sh" "awk" "html" "xml" "css" "md" "yml" "gyp" "gypi" "bib" "tex" "mk")
 
 
 # FUNCTIONS #
@@ -70,13 +70,19 @@ main() {
 		convert_line_endings "$file"
 
 		extension="${file##*.}"
+		filename=$(basename "$file")
+
 		local match_found=false
-		for ext in "${extensions[@]}"; do
-			if [[ "$ext" == "$extension" ]]; then
-				match_found=true
-				break
-			fi
-		done
+		if [[ "$filename" == "Makefile" ]]; then
+			match_found=true
+		elif [[ "$file" == *.* ]]; then
+			for ext in "${extensions[@]}"; do
+				if [[ "$ext" == "$extension" ]]; then
+					match_found=true
+					break
+				fi
+			done
+		fi
 		if [[ "$match_found" == true ]]; then
 			if [[ "$(tail -c1 "$file"; echo x)" != $'\nx' ]]; then
 				echo "Adding newline to: $file"