tuning the wording for test and documents

Author: chunming-c

docs/columns.md

@@ -423,7 +423,7 @@ A new `Object` will be the result of element headerAttrs.
 
 ### <a name='headerSortingClasses'>headerSortingClasses - [String | Function]</a>
 
-`headerSortingClasses` allows to customize `class` for header cell which the table was sorting based on. 
+`headerSortingClasses` allows to customize `class` for header cell when this column is sorting.
 
 ```js
 const headerSortingClasses = 'demo-sorting';
@@ -437,12 +437,12 @@ const headerSortingClasses = (column, sortOrder, isLastSorting, colIndex) => { .
 
 * `column`: The value of current column.
 * `sortOrder`: The order of current sorting
-* `isLastSorting`: Is the last one of sorting.
+* `isLastSorting`: Is the last one of sorted columns.
 * `colIndex`: The index of the current column being processed in BootstrapTable.
 
 ### <a name='headerSortingStyle'>headerSortingStyle - [Object | Function]</a>
 
-It's similiar to [headerSortingClasses](#headerSortingClasses). It allows to customize the style of header cell which the table was sorting based on. A style `Object` and `callback` are acceptable. `callback` takes **4** arguments and an `Object` is expected to return:
+It's similiar to [headerSortingClasses](#headerSortingClasses). It allows to customize the style of header cell when this column is sorting. A style `Object` and `callback` are acceptable. `callback` takes **4** arguments and an `Object` is expected to return:
 
 ```js
 const sortingHeaderStyle = {

packages/react-bootstrap-table2-example/stories/index.js

@@ -130,8 +130,8 @@ storiesOf('Sort Table', module)
   .add('Enable Sort', () => <EnableSortTable />)
   .add('Default Sort Table', () => <DefaultSortTable />)
   .add('Custom Sort Fuction', () => <CustomSortTable />)
-  .add('Header sorting classes', () => <HeaderSortingClassesTable />)
-  .add('Header sorting style', () => <HeaderSortingStyleTable />);
+  .add('Custom Classes on Sorting Header Column', () => <HeaderSortingClassesTable />)
+  .add('Custom Style on Sorting Header Column', () => <HeaderSortingStyleTable />);
 
 storiesOf('Cell Editing', module)
   .add('Click to Edit', () => <ClickToEditTable />)

packages/react-bootstrap-table2/test/header-cell.test.js

@@ -437,7 +437,7 @@ describe('HeaderCell', () => {
         });
       });
 
-      describe('when headerSortingClasses was defined ', () => {
+      describe('when headerSortingClasses is defined ', () => {
         const classes = 'foo';
         const order = Const.SORT_DESC;
 
@@ -516,7 +516,7 @@ describe('HeaderCell', () => {
           });
         });
 
-        describe('if column.headerClasses was defined as well', () => {
+        describe('if column.headerClasses is defined as well', () => {
           it('should keep both classes', () => {
             column = {
               ...column,
@@ -541,7 +541,7 @@ describe('HeaderCell', () => {
         });
       });
 
-      describe('when headerSortingStyle was defined', () => {
+      describe('when headerSortingStyle is defined', () => {
         const style = { backgroundColor: 'red' };
         const order = Const.SORT_DESC;