docs(minErr): add location/isrcharg docs

docs/content/error/location/isrcharg.ngdoc

@@ -0,0 +1,9 @@
+@ngdoc error
+@name $location:isrcharg
+@fullName Wrong $location.search() argument type
+@description
+
+To resolve this error, ensure that the first argument for the `$location.search` call is a `string` or an object.
+You can use the stack trace associated with this error to identify the call site that caused this issue.
+
+To learn more, please consult the {@link api/ng.$location `$location`} api docs.

docs/content/error/location/wpt.ngdoc

@@ -1,4 +0,0 @@
-@ngdoc error
-@name $location:wpt
-@fullName Wrong parameter type
-@description

src/ng/location.js

@@ -375,7 +375,7 @@ LocationHashbangInHtml5Url.prototype =
         } else if (isObject(search)) {
           this.$$search = search;
         } else {
-          throw $locationMinErr('wpt', 'First parameter of function must be string or an object.');
+          throw $locationMinErr('isrcharg', 'The first argument of the `$location#search()` call must be a string or an object.');
         }
         break;
       default:

test/ng/locationSpec.js

@@ -88,10 +88,10 @@ describe('$location', function() {
     it('search() should throw error an incorrect argument', function() {
       expect(function() {
         url.search(null);
-      }).toThrow('[$location:wpt] First parameter of function must be string or an object.');
+      }).toThrow('[$location:isrcharg] The first argument of the `$location#search()` call must be a string or an object.');
       expect(function() {
         url.search(undefined);
-      }).toThrow('[$location:wpt] First parameter of function must be string or an object.');
+      }).toThrow('[$location:isrcharg] The first argument of the `$location#search()` call must be a string or an object.');
     });