Fixed duplicate word on paragraph 29

* Minor fix on paragraph 11

README.md

@@ -8,7 +8,7 @@ This class extends from `ofShader` and helps on the process to write and mantain
 
 * Define keywords: easy to add/remove/toggle `#define` keywords.
 
-* GLSL version conversion: depending if it's using ES, Rendering pipeline or the legacy OpenGL 2.2 version will add/remove the proper `#version` defines and/or presicion defines.
+* GLSL version conversion: depending if it's using ES, Rendering pipeline or the legacy OpenGL 2.2 version will add/remove the proper `#version` defines and/or precision defines.
 
 * automatically filled uniforms: following the conventions introduce on [The Book of Shaders](https://thebookofshaders.com/) and followed by [glslCanvas](https://github.com/patriciogonzalezvivo/glslCanvas), [glslEditor](https://github.com/patriciogonzalezvivo/glslEditor) and [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer) the following uniforms are automatically handled for you:
 
@@ -26,6 +26,6 @@ This class extends from `ofShader` and helps on the process to write and mantain
 
 # ofxShaderFilter
 
-This class set's a `ofFbo` and a `ofxShader` instance inside to Sandbox your shader project to do: simulations or postprocessing filters. It automatically generates multiple buffers following the same pattern propose by [glslCanvas](https://github.com/patriciogonzalezvivo/glslCanvas) and [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer) so all shaders should work on WebGL through [glslCanvas](https://github.com/patriciogonzalezvivo/glslCanvas), the [on line editor](http://editor.thebookofshaders.com/) (source code [here](https://github.com/patriciogonzalezvivo/glslEditor)) or nativelly on on your RaspberryPi, Ubuntu Desktops or MacOS through [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer). Check the example `multiple_buffers` example to see how that works.
+This class set's a `ofFbo` and a `ofxShader` instance inside to Sandbox your shader project to do: simulations or postprocessing filters. It automatically generates multiple buffers following the same pattern propose by [glslCanvas](https://github.com/patriciogonzalezvivo/glslCanvas) and [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer) so all shaders should work on WebGL through [glslCanvas](https://github.com/patriciogonzalezvivo/glslCanvas), the [on line editor](http://editor.thebookofshaders.com/) (source code [here](https://github.com/patriciogonzalezvivo/glslEditor)) or natively on your RaspberryPi, Ubuntu Desktops or MacOS through [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer). Check the example `multiple_buffers` example to see how that works.
 
-# ofxShaderMaterial
+# ofxShaderMaterial