Minor text and grammar fixes

Author: ikotler

doc/foreword.rst

@@ -16,7 +16,7 @@ Python. The visual programming language is based on the idea of a diagram with
 "boxes and arrows".
 
 The Pythonect interpreter (and reference implementation) is a free and open
-source software written in completely Python, and is available under the BSD
+source software written completely in Python, and is available under the BSD
 license.
 
 Why Pythonect?

doc/tutorial/controlflow.rst

@@ -21,8 +21,8 @@ determine whether to terminate or continue the flow.
 :const:`True` as Pass-through
 -----------------------------
 
-Whenever a Python expression or function returns :const:`True`. The current
-value in the flow is pushed to the next operation. For example:  
+Whenever a Python expression or function returns :const:`True` the current
+value in the flow is pushed to the next operation. For example:   
 ::
 
     1 -> [_ < 2] -> print
@@ -42,8 +42,8 @@ Will print ``"Hello, world"`` because ``startswith`` method returned :const:`Tru
 :const:`False` as Terminator
 ----------------------------
 
-Whenever a Python expression or function returns :const:`False`. The current
-flow terminates and returns False. For example:
+Whenever a Python expression or function returns :const:`False` the current
+flow terminates and returns False. For example: 
 ::
 
     "Hello, world" -> _.startswith('ello') -> print

doc/tutorial/helloworld.rst

@@ -6,8 +6,8 @@ Hello World Program
 Pythonect provides both a visual programming language and a text-based
 scripting language. 
 
-The following is an example Hello world program in both, visual
-and text-based languages. Both versions consist of the same flow.
+The following is an example Hello world program in both visual and text-based
+languages. Both versions consist of the same flow.
 
 
 .. _tut-visualexample:
@@ -16,7 +16,7 @@ Visual Programming Version
 --------------------------
 
 Pythonect supports multiple graph describing languages and diagram formats.
-For the Hello world program, I will be using `Dia
+For the Hello world example I will be using `Dia
 <https://wiki.gnome.org/Dia/>`_.
 
 :program:`Dia` is a free and open source general-purpose diagramming software.

doc/tutorial/vars.rst

@@ -70,8 +70,8 @@ This will print, each in its own thread, and not necessarily in that order:
 :const:`1`, :const:`1`, :const:`0.34`, and :const:`"Hello world"`.
 
 
-Predefine Variables
-===================
+Predefined Variables
+====================
 
 Pythonect predefines two variables: ``_`` and ``_!``