Minor text changes

Author: Lyrkan

index.js

@@ -615,8 +615,7 @@ const publicApi = {
     },
 
     /**
-     * If enabled, the output directory is emptied between
-     * each build (to remove old files).
+     * If enabled, the output directory is emptied between each build (to remove old files).
      *
      * A list of available options can be found at https://github.com/johnagan/clean-webpack-plugin
      *

lib/WebpackConfig.js

@@ -373,7 +373,7 @@ class WebpackConfig {
 
     cleanupOutputBeforeBuild(paths = ['**/*'], cleanWebpackPluginOptionsCallback = () => {}) {
         if (!Array.isArray(paths)) {
-            throw new Error('Argument 1 to cleanupOutputBeforeBuild() must be an Array');
+            throw new Error('Argument 1 to cleanupOutputBeforeBuild() must be an Array of paths - e.g. [\'**/*\']');
         }
 
         if (typeof cleanWebpackPluginOptionsCallback !== 'function') {

test/WebpackConfig.js

@@ -187,7 +187,7 @@ describe('WebpackConfig object', () => {
 
             expect(() => {
                 config.cleanupOutputBeforeBuild('foo', () => {});
-            }).to.throw('Argument 1 to cleanupOutputBeforeBuild() must be an Array');
+            }).to.throw('Argument 1 to cleanupOutputBeforeBuild() must be an Array of paths');
         });
 
         it('Setting invalid callback argument', () => {