diff --git a/online-editor.js b/online-editor.js
index 6d1f3a9..53a0608 100644
--- a/online-editor.js
+++ b/online-editor.js
@@ -7,11 +7,7 @@ class BesEditor {
     this.children = []
     this.correctionPanel = document.getElementById('correction-panel') // TODO: use document.createElement('div') and insert it before edit element in DOM.
     this.proof(edit)
-    edit.addEventListener(
-      'beforeinput',
-      e => this.handleBeforeInput(e),
-      false
-    )
+    edit.addEventListener('beforeinput', e => this.handleBeforeInput(e), false)
     edit.addEventListener('click', e => this.handleClick(e))
   }
 
@@ -20,7 +16,7 @@ class BesEditor {
     switch (el.nodeType) {
       case Node.TEXT_NODE:
         return [{ text: el.textContent, el: el, markup: false }]
-  
+
       case Node.ELEMENT_NODE:
         if (BesEditor.isBlockElement(el)) {
           // Block elements are grammar-proofed independently.
@@ -60,7 +56,7 @@ class BesEditor {
                 let matches = []
                 responseData.matches.forEach(match => {
                   let range = document.createRange()
-  
+
                   // Locate start of the grammar mistake.
                   for (
                     let idx = 0, startingOffset = 0;
@@ -72,11 +68,14 @@ class BesEditor {
                       /*startingOffset <= match.offset &&*/ match.offset <
                         startingOffset + data[idx].text.length
                     ) {
-                      range.setStart(data[idx].el, match.offset - startingOffset)
+                      range.setStart(
+                        data[idx].el,
+                        match.offset - startingOffset
+                      )
                       break
                     }
                   }
-  
+
                   // Locate end of the grammar mistake.
                   let endOffset = match.offset + match.length
                   for (
@@ -93,14 +92,14 @@ class BesEditor {
                       break
                     }
                   }
-  
+
                   matches.push({
                     range: range,
                     rects: this.addMistakeMarkup(range, match),
                     match: match
                   })
                 })
-  
+
                 this.markProofed(el, matches)
               })
               .catch(error => {
@@ -123,7 +122,7 @@ class BesEditor {
           })
           return data
         }
-  
+
       default:
         return [{ text: '<?' + el.nodeType + '>', el: el, markup: true }]
     }
@@ -231,7 +230,8 @@ class BesEditor {
   // Returns first block parent element
   getBlockParent(el) {
     for (; el && el !== this.el; el = el.parentNode) {
-      if (el.nodeType === Node.ELEMENT_NODE && BesEditor.isBlockElement(el)) return el
+      if (el.nodeType === Node.ELEMENT_NODE && BesEditor.isBlockElement(el))
+        return el
     }
     return el
   }
@@ -277,7 +277,7 @@ class BesEditor {
     }
     return false
   }
-  
+
   static isPointInRect(x, y, rect) {
     return (
       x >= rect.x &&