Update comments (#4128)

* Update Doc

* Update Doc - 2

src/canvas.class.js

@@ -89,7 +89,7 @@
     centeredRotation:       false,
 
     /**
-     * Indicates which key enable centered Transfrom
+     * Indicates which key enable centered Transform
      * values: 'altKey', 'shiftKey', 'ctrlKey'.
      * If `null` or 'none' or any other string that is not a modifier key
      * feature is disabled feature disabled.
@@ -1193,7 +1193,7 @@
       // Cache all targets where their bounding box contains point.
       var target, i = objects.length, normalizedPointer, subTarget;
       // Do not check for currently grouped objects, since we check the parent group itself.
-      // untill we call this function specifically to search inside the activeGroup
+      // until we call this function specifically to search inside the activeGroup
       while (i--) {
         if (this._checkTarget(pointer, objects[i])) {
           target = objects[i];
@@ -1350,7 +1350,7 @@
     },
 
     /**
-     * Copys the the entire inline style from one element (fromEl) to another (toEl)
+     * Copy the entire inline style from one element (fromEl) to another (toEl)
      * @private
      * @param {Element} fromEl Element style is copied from
      * @param {Element} toEl Element copied style is applied to
@@ -1473,7 +1473,7 @@
 
     /**
      * Discards currently active object and fire events. If the function is called by fabric
-     * as a consequence of a mouse event, the event is passed as a parmater and
+     * as a consequence of a mouse event, the event is passed as a parameter and
      * sent to the fire function for the custom events. When used as a method the
      * e param does not have any application.
      * @param {event} e

src/filters/2d_backend.class.js

@@ -19,7 +19,7 @@
     /**
      * Experimental. This object is a sort of repository of help layers used to avoid
      * of recreating them during frequent filtering. If you are previewing a filter with
-     * a slider you problably do not want to create help layers every filter step.
+     * a slider you probably do not want to create help layers every filter step.
      * in this object there will be appended some canvases, created once, resized sometimes
      * cleared never. Clearing is left to the developer.
      **/

src/filters/filter_generator.js

@@ -71,7 +71,7 @@
       matrix: matrices[key],
 
       /**
-       * Lock the matrix export for this kind of static, parameterless filters.
+       * Lock the matrix export for this kind of static, parameter less filters.
        */
       mainParameter: false,
       /**

src/filters/grayscale_filter.class.js

@@ -57,7 +57,7 @@
 
 
     /**
-     * Grayscale mode, between 'average', 'lighntess', 'luminosity'
+     * Grayscale mode, between 'average', 'lightness', 'luminosity'
      * @param {String} type
      * @default
      */

src/point.class.js

@@ -118,7 +118,7 @@
     },
 
     /**
-     * Miltiplies this point by a value and returns a new one
+     * Multiplies this point by a value and returns a new one
      * TODO: rename in scalarMultiply in 2.0
      * @param {Number} scalar
      * @return {fabric.Point}
@@ -128,7 +128,7 @@
     },
 
     /**
-     * Miltiplies this point by a value
+     * Multiplies this point by a value
      * TODO: rename in scalarMultiplyEquals in 2.0
      * @param {Number} scalar
      * @return {fabric.Point} thisArg

src/shapes/active_selection.class.js

@@ -90,7 +90,7 @@
     },
 
     /**
-     * Returns string represenation of a group
+     * Returns string representation of a group
      * @return {String}
      */
     toString: function() {

src/shapes/text.class.js

@@ -777,10 +777,10 @@
 
     /**
      * measure and return the width of a single character.
-     * possibly overridden to accomodate differente measure logic or
+     * possibly overridden to accommodate different measure logic or
      * to hook some external lib for character measurement
      * @private
-     * @param {String} char char to be measured
+     * @param {String} char to be measured
      * @param {Object} charStyle style of char to be measured
      * @param {String} [previousChar] previous char
      * @param {Object} [prevCharStyle] style of previous char
@@ -876,7 +876,7 @@
         prevGrapheme = grapheme;
       }
       // this latest bound box represent the last character of the line
-      // to simplify cursor handling in interactive mdoe.
+      // to simplify cursor handling in interactive mode.
       lineBounds[i] = {
         left: graphemeInfo ? graphemeInfo.left + graphemeInfo.width : 0,
         width: 0,
@@ -1086,7 +1086,7 @@
      * @param {String} method
      * @param {CanvasRenderingContext2D} ctx Context to render on
      * @param {Number} lineIndex
-     * @param {Number} i
+     * @param {Number} charIndex
      * @param {String} _char
      * @param {Number} left Left coordinate
      * @param {Number} top Top coordinate
@@ -1171,7 +1171,7 @@
 
     /**
      * Measure a single line given its index. Used to calculate the initial
-     * text bouding box. The values are calculated and stored in __lineWidths cache.
+     * text bounding box. The values are calculated and stored in __lineWidths cache.
      * @private
      * @param {Number} lineIndex line number
      * @return {Number} Line width

src/shapes/textbox.class.js

@@ -100,7 +100,7 @@
         this._set('width', this.dynamicMinWidth);
       }
       if (this.textAlign === 'justify') {
-        // once text is misured we need to make space fatter to make justified text.
+        // once text is measured we need to make space fatter to make justified text.
         this.enlargeSpaces();
       }
       // clear cache and re-calculate height
@@ -330,7 +330,7 @@
 
     /**
     * Gets lines of text to render in the Textbox. This function calculates
-    * text wrapping on the fly everytime it is called.
+    * text wrapping on the fly every time it is called.
     * @param {String} text text to split
     * @returns {Array} Array of lines in the Textbox.
     * @override