fix(Stepper): fixed style errors in skyline (#3454)

Author: anlyyao

src/stepper/__test__/__snapshots__/index.test.js.snap

@@ -12,9 +12,7 @@ exports[`stepper event : input 1`] = `
     class="t-stepper__minus t-stepper__minus--normal t-stepper__icon--medium  t-class-minus"
     catch:tap="minusValue"
   >
-    <t-icon
-      class="t-stepper__minus-icon"
-    >
+    <t-icon>
       <wx-view
         ariaHidden="{{false}}"
         ariaLabel=""
@@ -47,12 +45,10 @@ exports[`stepper event : input 1`] = `
     ariaDisabled="{{false}}"
     ariaLabel="增加2"
     ariaRole="button"
-    class="t-stepper__plus t-stepper__plus--normal t-stepper__icon--medium   t-class-plus"
+    class="t-stepper__plus t-stepper__plus--normal t-stepper__icon--medium  t-class-plus"
     catch:tap="plusValue"
   >
-    <t-icon
-      class="t-stepper__plus-icon"
-    >
+    <t-icon>
       <wx-view
         ariaHidden="{{false}}"
         ariaLabel=""
@@ -82,9 +78,7 @@ exports[`stepper event : input 2`] = `
     class="t-stepper__minus t-stepper__minus--normal t-stepper__icon--medium  t-class-minus"
     catch:tap="minusValue"
   >
-    <t-icon
-      class="t-stepper__minus-icon"
-    >
+    <t-icon>
       <wx-view
         ariaHidden="{{false}}"
         ariaLabel=""
@@ -117,12 +111,10 @@ exports[`stepper event : input 2`] = `
     ariaDisabled="{{false}}"
     ariaLabel="增加2"
     ariaRole="button"
-    class="t-stepper__plus t-stepper__plus--normal t-stepper__icon--medium   t-class-plus"
+    class="t-stepper__plus t-stepper__plus--normal t-stepper__icon--medium  t-class-plus"
     catch:tap="plusValue"
   >
-    <t-icon
-      class="t-stepper__plus-icon"
-    >
+    <t-icon>
       <wx-view
         ariaHidden="{{false}}"
         ariaLabel=""

src/stepper/stepper.wxml

@@ -11,7 +11,7 @@
     aria-role="button"
     aria-disabled="{{disabled || disableMinus || currentValue <= min}}"
   >
-    <t-icon name="remove" class="{{classPrefix}}__minus-icon" />
+    <t-icon name="remove" />
   </view>
   <view
     class="{{classPrefix}}__input--{{theme}} {{ disabled || disableInput ? classPrefix + '--' + theme + '-disabled': ''}}"
@@ -28,12 +28,12 @@
     />
   </view>
   <view
-    class="{{classPrefix}}__plus {{classPrefix}}__plus--{{theme}} {{classPrefix}}__icon--{{size}}  {{ disabled || disablePlus|| currentValue >= max ? classPrefix + '--' + theme + '-disabled': ''}} {{prefix}}-class-plus"
+    class="{{classPrefix}}__plus {{classPrefix}}__plus--{{theme}} {{classPrefix}}__icon--{{size}} {{ disabled || disablePlus|| currentValue >= max ? classPrefix + '--' + theme + '-disabled': ''}} {{prefix}}-class-plus"
     catchtap="plusValue"
     aria-label="{{'增加' + step}}"
     aria-role="button"
     aria-disabled="{{disabled || disablePlus|| currentValue >= max}}"
   >
-    <t-icon name="add" class="{{classPrefix}}__plus-icon" />
+    <t-icon name="add" />
   </view>
 </view>