diff --git a/src/build.js b/src/build.js
index 5268bb1..3c36eb7 100644
--- a/src/build.js
+++ b/src/build.js
@@ -1,5 +1,3 @@
-import { join } from 'node:path'
-
 const INDEX_TEMPLATE_NAME = 'index.pug'
 const INDEX_OUTPUT_NAME = 'index.html'
 const ASSET_DIR_NAME = 'assets'
@@ -44,31 +42,22 @@ export function renderIndex(
 ) {
   return withSrcDir((prefixWithSrcDir) => {
     return withBuildDir(async (prefixWithBuildDir) => {
-      const renderedTemplate = renderTemplate(
-        await readFile(prefixWithSrcDir(INDEX_TEMPLATE_NAME)),
-        data,
-      )
-
       return writeFile(
         prefixWithBuildDir(INDEX_OUTPUT_NAME),
-        renderedTemplate,
+        renderTemplate(
+          await readFile(prefixWithSrcDir(INDEX_TEMPLATE_NAME)),
+          data,
+        ),
       )
     })
   })
 }
 
-export function copyAssetDir(
-  withSrcDir,
-  withBuildDir,
-  copyDir,
-  ifPathExists,
-) {
+export function copyAssetDir(withSrcDir, withBuildDir, copyDir, ifPathExists) {
   return withSrcDir((prefixWithSrcDir) => {
     return withBuildDir((prefixWithBuildDir) => {
-      const assetDirPath = prefixWithSrcDir(ASSET_DIR_NAME)
-
       return ifPathExists(
-        assetDirPath,
+        prefixWithSrcDir(ASSET_DIR_NAME),
         (path) => copyDir(path, prefixWithBuildDir(ASSET_DIR_NAME)),
       )
     })
diff --git a/src/data.js b/src/data.js
index dc3f0b2..39b8d49 100644
--- a/src/data.js
+++ b/src/data.js
@@ -9,12 +9,7 @@ function normalizeEnvVarName(str) {
   )
 }
 
-export function parseDataFromJsonFile(
-  withSrcDir,
-  ifPathExists,
-  readFile,
-  parseJson,
-) {
+export function parseDataFromJsonFile(withSrcDir, ifPathExists, readFile, parseJson) {
   return withSrcDir((prefixWithSrcDir) => {
     const jsonFilePath = prefixWithSrcDir(JSON_FILE_NAME)
 
@@ -26,6 +21,10 @@ export function parseDataFromJsonFile(
   })
 }
 
+/**
+ * Extracts env vars whose name starts with `ENV_VAR_PREFIX`, converts this name
+ * to snake case, and returns a normalized dictionary of these extracted vars.
+ */
 export function parseDataFromEnv(envObject) {
   return (
     Object.fromEntries(
diff --git a/src/i18n.js b/src/i18n.js
index eb5eede..a042bf5 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -5,13 +5,7 @@ const LANG_PATTERN = /^[a-z]{2}$/
 const TRANSLATION_DIR_PATH = 'i18n'
 const TRANSLATION_FILE_PREFIX = '.json'
 
-export function parseTranslations(
-  withSrcDir,
-  ifPathExists,
-  readFile,
-  parseJson,
-  lang,
-) {
+export function parseTranslations(withSrcDir, ifPathExists, readFile, parseJson, lang) {
   assert.match(lang, LANG_PATTERN)
 
   return withSrcDir((prefixWithSrcDir) => {
@@ -23,7 +17,7 @@ export function parseTranslations(
     return ifPathExists(
       translationFilePath,
       async () => parseJson(await readFile(translationFilePath)),
-      {}
+      {},
     )
   })
 }
diff --git a/src/index.js b/src/index.js
index f13b979..d8f0322 100644
--- a/src/index.js
+++ b/src/index.js
@@ -13,15 +13,17 @@ import { parseTranslations } from '#src/i18n'
 import { parseJson } from '#src/utils/json'
 import renderTemplate from '#src/renderTemplate/pug'
 
-export default async function buildProject(srcDirPath, buildDirPath, lang = null) {
+export default async function buildProject(
+  srcDirPath,
+  buildDirPath,
+  lang = null,
+) {
   await ifPathExists(buildDirPath, rmDir)
 
-  const [withSrcDir, withBuildDir] = await (
-    Promise.all([
-      withDir(srcDirPath),
-      withScratchDir(buildDirPath),
-    ])
-  )
+  const [withSrcDir, withBuildDir] = await Promise.all([
+    withDir(srcDirPath),
+    withScratchDir(buildDirPath),
+  ])
 
   const data = await parseData(
     withSrcDir,
diff --git a/tests/data.test.js b/tests/data.test.js
index a076e7c..2a656a9 100644
--- a/tests/data.test.js
+++ b/tests/data.test.js
@@ -1,8 +1,8 @@
 import { describe, it } from 'node:test'
 import assert from 'node:assert'
+import { withTempDir } from '#tests/helpers'
 import { mkdir, writeFile } from 'node:fs/promises'
 import { join } from 'node:path'
-import { withTempDir } from '#tests/helpers'
 import { withDir, ifPathExists, readFile } from '#src/utils/fs'
 import { parseJson } from '#src/utils/json'
 import { parseDataFromJsonFile, parseDataFromEnv } from '#src/data'
@@ -18,12 +18,7 @@ describe('#src/data', () => {
         await writeFile(jsonFilePath, '{"stuff": ["thing", "trinket", "gizmo"]}')
 
         assert.deepStrictEqual(
-          await parseDataFromJsonFile(
-            withDir(dirPath),
-            ifPathExists,
-            readFile,
-            parseJson,
-          ),
+          await parseDataFromJsonFile(withDir(dirPath), ifPathExists, readFile, parseJson),
           {
             stuff: [
               'thing',
diff --git a/tests/i18n.test.js b/tests/i18n.test.js
index fadec35..9b38523 100644
--- a/tests/i18n.test.js
+++ b/tests/i18n.test.js
@@ -1,9 +1,9 @@
 import { describe, it } from 'node:test'
 import assert from 'node:assert'
+import { withTempDir } from '#tests/helpers'
 import { join } from 'node:path'
 import { mkdir, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
-import { withTempDir } from '#tests/helpers'
 import { withDir, ifPathExists, readFile } from '#src/utils/fs'
 import { parseJson } from '#src/utils/json'
 import { parseTranslations } from '#src/i18n'