Update fluid.md

Author: bryannielsen

docs/fieldtypes/fluid.md

@@ -181,25 +181,25 @@ Additionally, the following variable are available **when using custom field gro
 
     {fluid_content:count_in_group}
 
-The "count" out of the field being displayed in current field group. If five fields are in group, then for the fourth field the `count` variable would have a value of "4". 
+The "count" out of the fields being displayed in a field group. If five fields are in a group, then for the fourth field the `count` variable would have a value of "4". 
 
 ### `first_in_group`
 
     {fluid_content:first_in_group}
 
-True, if the current field is the first one in current field group. 
+True, if the current field is the first one in the current field group. 
 
 ### `index_in_group`
 
     {fluid_content:index_in_group}
 
-The index of the field being displayed in current field group starting at 0.
+The index of the field being displayed in the current field group starting at 0.
 
 ### `last_in_group`
 
     {fluid_content:last_in_group}
 
-True, if the current field is the last one in current field group.
+True, if the current field is the last one in the current field group.
 
 ### `first_group`