diff --git a/src/admin/class-footnotes-admin.php b/src/admin/class-footnotes-admin.php
index bf9a136..b242f39 100644
--- a/src/admin/class-footnotes-admin.php
+++ b/src/admin/class-footnotes-admin.php
@@ -70,7 +70,7 @@ class Footnotes_Admin {
 		 * The class responsible for WYSIWYG editor integration.
 		 */
 		require_once plugin_dir_path( dirname( __FILE__ ) ) . 'admin/class-footnotes-wysiwyg.php';
-		
+
 		/**
 		 * The class responsible for constructing the plugin dashboard page(s).
 		 */
diff --git a/src/admin/layout/class-footnotes-layout-engine.php b/src/admin/layout/class-footnotes-layout-engine.php
index 565bd7e..07a3c59 100644
--- a/src/admin/layout/class-footnotes-layout-engine.php
+++ b/src/admin/layout/class-footnotes-layout-engine.php
@@ -14,7 +14,7 @@
  * @since 2.5.5  Bugfix: Stylesheets: minify to shrink the carbon footprint, increase speed and implement best practice, thanks to @docteurfitness issue report.
  */
 
-require_once plugin_dir_path( dirname( __FILE__ ) ). 'layout/class-footnotes-layout-init.php';
+require_once plugin_dir_path( dirname( __FILE__ ) ) . 'layout/class-footnotes-layout-init.php';
 
 /**
  * Layout Engine for the administration dashboard.
diff --git a/src/admin/layout/class-footnotes-layout-init.php b/src/admin/layout/class-footnotes-layout-init.php
index e766075..3dca904 100644
--- a/src/admin/layout/class-footnotes-layout-init.php
+++ b/src/admin/layout/class-footnotes-layout-init.php
@@ -38,7 +38,7 @@ class Footnotes_Layout_Init {
 	 */
 	public function __construct() {
 		$this->load_dependencies();
-		
+
 		$this->settings_page = new Footnotes_Layout_Settings();
 
 		// Register hooks/actions.
@@ -68,12 +68,12 @@ class Footnotes_Layout_Init {
 		 * The class responsible for defining plugin constants.
 		 */
 		require_once plugin_dir_path( dirname( __FILE__, 2 ) ) . 'includes/class-footnotes-config.php';
-		
+
 		/**
 		 * The class responsible for tracking configurable plugin settings.
 		 */
 		require_once plugin_dir_path( dirname( __FILE__, 2 ) ) . 'includes/class-footnotes-settings.php';
-		
+
 		/**
 		 * The class responsible for defining the plugin settings page.
 		 */
diff --git a/src/includes/class-footnotes.php b/src/includes/class-footnotes.php
index 4df02cc..568a726 100644
--- a/src/includes/class-footnotes.php
+++ b/src/includes/class-footnotes.php
@@ -110,7 +110,7 @@ class Footnotes {
 		 * of the plugin.
 		 */
 		require_once plugin_dir_path( dirname( __FILE__ ) ) . 'includes/class-footnotes-i18n.php';
-		
+
 		/**
 		 * The various utility classes.
 		 */
@@ -165,7 +165,7 @@ class Footnotes {
 		$this->loader->add_action( 'admin_enqueue_scripts', $plugin_admin, 'enqueue_styles' );
 		$this->loader->add_action( 'admin_enqueue_scripts', $plugin_admin, 'enqueue_scripts' );
 
-		$this->loader->add_filter('plugin_action_links_footnotes/footnotes.php', $plugin_admin, 'footnotes_action_links');
+		$this->loader->add_filter( 'plugin_action_links_footnotes/footnotes.php', $plugin_admin, 'footnotes_action_links' );
 	}
 
 	/**
diff --git a/src/public/class-footnotes-public.php b/src/public/class-footnotes-public.php
index 3067ef2..3d48b37 100644
--- a/src/public/class-footnotes-public.php
+++ b/src/public/class-footnotes-public.php
@@ -131,7 +131,7 @@ class Footnotes_Public {
 	/**
 	 * Register the stylesheets for the public-facing side of the site.
 	 *
-	 * Enables enqueuing the formatted individual stylesheets if `PRODCUTION_ENV` 
+	 * Enables enqueuing the formatted individual stylesheets if `PRODCUTION_ENV`
 	 * is true (set in `footnotes.php`).
 	 *
 	 * @since 1.5.0