Fix typos in docs

docs/AFDKO-Overview.md

@@ -5,11 +5,11 @@ Adobe Font Development Kit for OpenType (AFDKO) Overview
 
 # 1. Introduction
 
-This release of the Adobe Font Development Kit for OpenType (AFDKO) contains a set of tools used to make OpenType fonts by adding the OpenType-specific data to a TrueType or Type1 font. It does not offer tools for designing or editing glyphs. These command-line programs will allow you to build an OpenType font from an existing font, verify the contents of the font, and proof the font on screen or on paper. The AFDKO also contains useful technical documentation and some example font source material. Note! Although the FDK directory tree contains a number of Python scripts, none of them can be used by double-clicking on them; they can only be called by typing commands into a command-line window.
+This release of the Adobe Font Development Kit for OpenType (AFDKO) contains a set of tools used to make OpenType fonts by adding the OpenType-specific data to a TrueType or Type1 font. It does not offer tools for designing or editing glyphs. These command line programs will allow you to build an OpenType font from an existing font, verify the contents of the font, and proof the font on screen or on paper. The AFDKO also contains useful technical documentation and some example font source material. Note! Although the FDK directory tree contains a number of Python scripts, none of them can be used by double-clicking on them; they can only be called by typing commands into a command line window.
 
 See the [`afdko`](https://github.com/adobe-type-tools/afdko) home page for installation instructions.
 
-Once the AFDKO is installed, all the command-line programs can be run by entering the command name in a Terminal window (OSX, Windows, Linux), along with the necessary option text. All command-line tools provide usage and help text with the options `-u` and `-h`.
+Once the AFDKO is installed, all the command line programs can be run by entering the command name in a Terminal window (OSX, Windows, Linux), along with the necessary option text. All command line tools provide usage and help text with the options `-u` and `-h`.
 
 # 2. Overview of Programs
 
@@ -19,7 +19,7 @@ The tools fall into several different functional groups.
 
 ### `autohint`/`psautohint`
 
-This program is the Adobe auto-hinter. It can be applied to both OpenType/CFF and Type 1 fonts. Works with Type 1 and OpenType/CFF fonts only. It uses Just von Rossum's [`fontTools`](https://github.com/fonttools/fonttools) Python package for accessing and changing the font data.
+This program is the Adobe auto-hinter. It can be applied to both OpenType/CFF and Type 1 fonts. Works with Type 1 and OpenType/CFF fonts only. It uses Just van Rossum's [`fontTools`](https://github.com/fonttools/fonttools) Python package for accessing and changing the font data.
 
 ### `makeotf`
 
@@ -35,7 +35,7 @@ This script will use a .designspace file and the output OTFs of `buildmasterotfs
 
 ### `makeinstancesufo`
 
-This script will generate UFO instances from a .designspace file, and a set of compatible UFO masters. More info on designspace files and interpolation systems can be found at [Superpolator.com](http://superpolator.com/).
+This script will generate UFO instances from a .designspace file, and a set of compatible UFO masters. More info on designspace files and interpolation systems can be found at [Superpolator.com](http://superpolator.com/) and [DesignSpaceDocument Specification](https://github.com/fonttools/fonttools/tree/master/Doc/source/designspaceLib).
 
 ### `mergefonts`
 
@@ -63,15 +63,15 @@ This allows you to cut and paste the entire binary block of a font table from on
 
 ### `stemhist`/`psstemhist`
 
-This program provides reports which help in selecting the global hint data and alignment zones for Type 1 hinting. You should look at the reports from this tool in order to select the most common stem widths, and then use a program such as FontLab or Robofont to set the values in the font. This should be done before hinting the font. Works with Type 1 and OpenType/CFF fonts only.
+This program provides reports which help in selecting the global hint data and alignment zones for Type 1 hinting. You should look at the reports from this tool in order to select the most common stem widths, and then use a program such as FontLab or RoboFont to set the values in the font. This should be done before hinting the font. Works with Type 1 and OpenType/CFF fonts only.
 
 ### `ttfcomponentizer`
 
-Componentizes glyphs of a TrueType font with information from an external UFO font. The script only supports components that are not scaled, rotated nor flipped.
+Componentizes glyphs of a TrueType font with information from an external UFO font. The script only supports components that are not scaled, rotated or flipped.
 
 ### `ttx`
 
-This tool can dump all or a few tables from an OpenType font to a human-readable text XML file, and can compile this XML file back to full OpenType font. It is an ideal tool for making simple changes of a few values. Used with care, it can also be used to make extensive changes. This is tool is provided by Just von Rossum as part of the fontTools library. It is provided here for convenience, in a form that does not require an installed Python interpreter.
+This tool can dump all or a few tables from an OpenType font to a human-readable text XML file, and can compile this XML file back to full OpenType font. It is an ideal tool for making simple changes of a few values. Used with care, it can also be used to make extensive changes. This is tool is provided by Just van Rossum as part of the fontTools library. It is provided here for convenience, in a form that does not require an installed Python interpreter.
 
 ### `tx`
 
@@ -89,7 +89,7 @@ This program can report data from an OpenType font in a variety of ways. All tab
 
 ### `tx`
 
-This tool has two modes that are useful for proofing. With the `-bc` option, it will rasterize a glyph to the command-line window, using ASCII characters. This is surprisingly useful when you want a quick look at a glyph. With the `-pdf` option, it will write a pdf file which shows the glyphs in the font, either 320 per page or 1 per page.
+This tool has two modes that are useful for proofing. With the `-bc` option, it will rasterize a glyph to the command line window, using ASCII characters. This is surprisingly useful when you want a quick look at a glyph. With the `-pdf` option, it will write a pdf file which shows the glyphs in the font, either 320 per page or 1 per page.
 
 ### `ttx`
 
@@ -119,11 +119,11 @@ Shows one glyph per page. Shows hints and alignment zones.
 
 Shows a waterfall of point sizes for all glyphs in the font. This is used to evaluate hinting. In order to allow hinting to be seen, the font is embedded in the PDF, and glyphs are referenced by char code. Does not yet work with TrueType and CID-keyed fonts.
 
-Note that the tools ending in "plot" are all simply small command-file scripts that call a single Python script with different options. The `-h` option for all these scripts will produce the same list of **all** the options supported by the single Python script. You can customize the PDF proofs by providing additional options. Look at the command files; these can by edited to supply additional options to the main script. This was completed shortly before the FDK was released, and has seen little use. It will improve over time. It uses the OpenSource Python package "Pickle" to create the PDF documents, and Just von Rossum's fontTools Python package for accessing the font data.
+Note that the tools ending in “plot” are all simply small command-file scripts that call a single Python script with different options. The `-h` option for all these scripts will produce the same list of **all** the options supported by the single Python script. You can customize the PDF proofs by providing additional options. Look at the command files; these can be edited to supply additional options to the main script. This was completed shortly before the FDK was released, and has seen little use. It will improve over time. It uses the OpenSource Python package “Pickle” to create the PDF documents, and Just van Rossum's fontTools Python package for accessing the font data.
 
 ## 2.3 Validation
 
-### `autohint`
+### `psautohint`
 
 The auto-hinting program will report at length about hinting issues. Some of these you can ignore, such as reports about near misses when a stem could be controlled by a hint-zone but is just a little too wide or too narrow. By adjusting either the stem widths or the hint-zones according to these reports, you can include more stems in the set that are controlled by hints, but you can also reasonably decide that is not worth the effort. However, many complaints do need fixing, such not having nodes at vertical or horizontal extremes of a curve.
 
@@ -133,20 +133,20 @@ This tool will check the quality of the glyph outline data, and should always be
 
 ### `comparefamily`
 
-The tool examines all the fonts in a directory and runs many quality checks. It is the only tool which checks consistency and compares data across a family of fonts, as well as in a single font. It will point out any errors in naming within a style-linked group. Every time the Adobe Type Department finds a bug in the Adobe OpenType fonts, we try to put a check in here. It is not a complete validation tool, but it does represents several years of experience of mistakes made by typographers.
+The tool examines all the fonts in a directory and runs many quality checks. It is the only tool which checks consistency and compares data across a family of fonts, as well as in a single font. It will point out any errors in naming within a style-linked group. Every time the Adobe Type Department finds a bug in the Adobe OpenType fonts, we try to put a check in here. It is not a complete validation tool, but it does represent several years of experience of mistakes made by typographers.
 
 ### `sfntdiff`
 
 This tool does a low-level comparison of two OpenType font files. It is most useful for quickly checking if two fonts are identical, or in which tables they differ.
 
 ### `ttx`
 
-The best way to see in detail how two fonts differ is to use the ttx tool to dump XML files, and then compare them with a good difference editor, such as BBEdit on the Mac, or UltraEdit on the PC. This tool was developed by Just von Rossum of LettError, and is available under OpenSource licensing from: https://github.com/fonttools/fonttools
+The best way to see in detail how two fonts differ is to use the ttx tool to dump XML files, and then compare them with a good difference editor, such as BBEdit on the Mac, or UltraEdit on the PC. This tool was developed by Just van Rossum of LettError, and is available under OpenSource licensing from: https://github.com/fonttools/fonttools
 
 ### `ttxn`
 
-This tool is used to test if two fonts are functionally the same. It sorts and modifies the output from the ttx and tx tools to build a normalized text dump that eliminates differences due to issues such as OTL table record order, glyph order and subroutinzation differences. It writes one file for each table in the font. A good difference editor, such as BBEdit on the Mac, or UltraEdit on the PC, can then be used to compare the output files from two different fonts. It is particularly useful in comparing older and newer versions of the same font.
+This tool is used to test if two fonts are functionally the same. It sorts and modifies the output from the ttx and tx tools to build a normalized text dump that eliminates differences due to issues such as OTL table record order, glyph order and subroutinization differences. It writes one file for each table in the font. A good difference editor, such as BBEdit on the Mac, or UltraEdit on the PC, can then be used to compare the output files from two different fonts. It is particularly useful in comparing older and newer versions of the same font.
 
 ### `tx`
 
-This tool has a couple of modes that are good for testing. It will show only data about the font program with in a font file, either CFF or TrueType. The `-dump` option is good for looking at a text report of the CFF font global and glyph data. The `-bc` option takes additional option that outputs a hash of the rasterized glyphs to a file. This good for finding if hinting has changed in a font; if the hash files for a set of glyphs are the same between two fonts, then the glyphs rasterized identically at the specified point size. You can use this to judge if fonts are functionally equivalent, even if the outlines are not exactly the same. Finally, converting any font to CFF will yield error reports if the font data is not syntactically correct, and if any glyphs are not hinted.
+This tool has a couple of modes that are good for testing. It will show only data about the font program within a font file, either CFF or TrueType. The `-dump` option is good for looking at a text report of the CFF font global and glyph data. The `-bc` option takes additional option that outputs a hash of the rasterized glyphs to a file. This is good for finding if hinting has changed in a font; if the hash files for a set of glyphs are the same between two fonts, then the glyphs rasterized identically at the specified point size. You can use this to judge if fonts are functionally equivalent, even if the outlines are not exactly the same. Finally, converting any font to CFF will yield error reports if the font data is not syntactically correct, and if any glyphs are not hinted.